Biggest changeThe low customer acquisition cost in 2021 was primarily due to a limitation on our ability to use door-to-door marketing as a result of COVID-19 and a reduction in targeted organic customer acquisitions as we focused our efforts to improve our organic sales channels, including vendor selection and sales quality. 61 Table of Contents Operating Segment Results Year Ended December 31, 2023 2022 2021 (in thousands, except volume and per unit operating data) Retail Electricity Segment Total Revenues $ 328,466 $ 352,750 $ 322,594 Retail Cost of Revenues 240,979 275,701 284,794 Less: Net (Losses) Gains on non-trading derivatives, net of cash settlements (79) (15,265) 6,194 Non-recurring event - winter storm Uri — 9,565 (64,403) Retail Gross Margin (1) —Electricity $ 87,566 $ 82,749 $ 96,009 Volumes—Electricity (MWhs) (3) 2,008,947 2,433,906 2,677,681 Retail Gross Margin (2) (4) —Electricity per MWh $ 43.59 $ 34.00 $ 35.86 Retail Natural Gas Segment Total Revenues $ 110,894 $ 110,065 $ 75,134 Retail Cost of Revenues 68,202 81,395 38,425 Less: Net (Losses) Gains on non-trading derivatives, net of cash settlements (4,797) (3,396) 184 Retail Gross Margin (1) —Gas $ 47,489 $ 32,066 $ 36,525 Volumes—Gas (MMBtus) 11,252,862 11,558,952 8,611,285 Retail Gross Margin (2) —Gas per MMBtu $ 4.22 $ 2.77 $ 4.24 (1) Reflects the Retail Gross Margin attributable to our Retail Electricity Segment or Retail Natural Gas Segment, as applicable.
Biggest changeThis increase was primarily due to increased sales activity in 2023 as compared to 2022. 52 Table of Contents Operating Segment Results Year Ended December 31, 2024 2023 2022 (in thousands, except volume and per unit operating data) Retail Electricity Segment Total Revenues $ 300,347 $ 328,466 $ 352,750 Retail Cost of Revenues 186,246 240,979 275,701 Less: Net Gains (Losses) on non-trading derivatives, net of cash settlements 20,432 (79) (15,265) Non-recurring event - winter storm Uri — — 9,565 Retail Gross Margin (1) —Electricity $ 93,669 $ 87,566 $ 82,749 Volumes—Electricity (MWhs) 2,035,597 2,008,947 2,433,906 Retail Gross Margin (2) —Electricity per MWh $ 46.02 $ 43.59 $ 34.00 Retail Natural Gas Segment Total Revenues $ 99,071 $ 110,894 $ 110,065 Retail Cost of Revenues 43,231 68,202 81,395 Less: Net Gains (Losses) on non-trading derivatives, net of cash settlements 7,975 (4,797) (3,396) Retail Gross Margin (1) —Gas $ 47,865 $ 47,489 $ 32,066 Volumes—Gas (MMBtus) 11,603,745 11,252,862 11,558,952 Retail Gross Margin (2) —Gas per MMBtu $ 4.12 $ 4.22 $ 2.77 (1) Reflects the Retail Gross Margin attributable to our Retail Electricity Segment or Retail Natural Gas Segment, as applicable.
During these same periods, we paid these local regulated utilities a weighted average discount of approximately 1.0%, 0.9% and 0.9%, respectively, of total revenues for customer credit risk protection. Weather Conditions Weather conditions directly influence the demand for natural gas and electricity and affect the prices of energy commodities.
During these same periods, we paid these local regulated utilities a weighted average discount of approximately 1.2%, 1.0% and 0.9%, respectively, of total revenues for customer credit risk protection. Weather Conditions Weather conditions directly influence the demand for natural gas and electricity and affect the prices of energy commodities.
This decrease was primarily due to lower electricity volumes sold as a result of a smaller electricity customer book during 2023 as compared to 2022, offset by a increase in electricity supply costs due to higher electricity commodity price environment in 2023.
This decrease was primarily due to lower electricity volumes sold as a result of a smaller electricity customer book during 2023 as compared to 2022, offset by an increase in electricity supply costs due to higher electricity commodity price environment in 2023.
The Company writes off customer balances when it believes that amounts are no longer collectible and when it has exhausted all means to collect these receivables. 69 Table of Contents For trade accounts receivables, the Company accrues an allowance for credit losses by business segment by pooling customer accounts receivables based on similar risk characteristics, such as customer type, geography, aging analysis, payment terms, and related macroeconomic factors.
The Company writes off customer balances when it believes that amounts are no longer collectible and when it has exhausted all means to collect these receivables. 60 Table of Contents For trade accounts receivables, the Company accrues an allowance for credit losses by business segment by pooling customer accounts receivables based on similar risk characteristics, such as customer type, geography, aging analysis, payment terms, and related macroeconomic factors.
Cash flows provided by operating activities for the year ended December 31, 2023 increased by $33.1 million compared to the year ended December 31, 2022. The increase was primarily the result of higher net income in 2023 coupled with other changes in working capital.
Cash flows provided by operating activities for the year ended December 31, 2023 increased by $33.1 million compared to the year ended December 31, 2022. The increase was primarily the result of higher net income in 2023 coupled with other changes in working capital. Cash Flows Used in Investing Activities .
See "— Sources of Liquidity and Capital Resources — Amended and Restated Subordinated Debt Facility." Borrowings and related posting of letters of credit under our Senior Credit Facility are subject to material variations on a seasonal basis due to the timing of commodity purchases to satisfy natural gas inventory requirements and to meet customer demands during periods of peak usage.
See "— Sources of Liquidity and Capital Resources — Amended and Restated Subordinated Debt Facility." 55 Table of Contents Borrowings and related posting of letters of credit under our Senior Credit Facility are subject to material variations on a seasonal basis due to the timing of commodity purchases to satisfy natural gas inventory requirements and to meet customer demands during periods of peak usage.
In this segment, we purchase natural gas supply through physical and financial transactions with market counterparties and supply natural gas to residential and commercial consumers pursuant to fixed-price and variable-price contracts. For the years ended December 31, 2023, 2022 and 2021, approximately 25%, 24% and 19%, respectively, of our retail revenues were derived from the sale of natural gas.
In this segment, we purchase natural gas supply through physical and financial transactions with market counterparties and supply natural gas to residential and commercial consumers pursuant to fixed-price and variable-price contracts. For the years ended December 31, 2024, 2023 and 2022, approximately 25%, 25% and 24%, respectively, of our retail revenues were derived from the sale of natural gas.
On October 31, 2023, we performed a quantitative assessment of goodwill in accordance with guidance from ASC 350, in which we compared our estimate of the fair value of our reporting units with their carrying values, including goodwill.
On October 31, 2024, we performed a quantitative assessment of goodwill in accordance with guidance from ASC 350, in which we compared our estimate of the fair value of our reporting units with their carrying values, including goodwill.
We have entered into other energy-related contracts that do not meet the definition of a derivative instrument or for which we made a normal purchase, normal sale election and are therefore not accounted for at fair value. Goodwill As noted above, Goodwill represents the excess of cost over fair value of the assets of businesses.
We have entered into other energy-related contracts that do not meet the definition of a derivative instrument or for which we made a normal purchase, normal sale election and are therefore not accounted for at fair value. Goodwill Goodwill represents the excess of cost over fair value of the assets of businesses.
For the years ended December 31, 2023, 2022 and 2021, approximately 55%, 59% and 59%, respectively, of our retail revenues were collected through POR programs where substantially all of our credit risk was with local regulated utility companies. As of December 31, 2023, 2022 and 2021, all of these local regulated utility companies had investment grade ratings.
For the years ended December 31, 2024, 2023 and 2022, approximately 60%, 55% and 59%, respectively, of our retail revenues were collected through POR programs where substantially all of our credit risk was with local regulated utility companies. As of December 31, 2024, 2023 and 2022, all of these local regulated utility companies had investment grade ratings.
(Refer to Note 9 "Debt" in the Company’s audited consolidated financial statements for discussion of the material terms of our Senior Credit Facility, including the covenant requirements for our Minimum Fixed Charge Coverage Ratio, Maximum Total Leverage Ratio, and Maximum Senior Secured Leverage Ratio.) The GAAP measures most directly comparable to Adjusted EBITDA are net income (loss) and net cash provided by (used in) operating activities.
(Refer to Note 9 "Debt" in the Company’s audited consolidated financial statements for discussion of the material terms of our Senior Credit Facility, including the covenant requirements for our Minimum Fixed Charge Coverage Ratio and Maximum Total Leverage Ratio) 46 Table of Contents The GAAP measures most directly comparable to Adjusted EBITDA are net income (loss) and net cash provided by (used in) operating activities.
For a discussion of the status of current legal and regulatory matters, see Note 13 "Commitments and Contingencies" in the Company’s audited consolidated financial statements. 71 Table of Contents
For a discussion of the status of current legal and regulatory matters, see Note 13 "Commitments and Contingencies" in the Company’s audited consolidated financial statements. 62 Table of Contents
The goodwill on our consolidated balance sheet as of December 31, 2023 is associated with both our Retail Natural Gas and Retail Electricity reporting units.
The goodwill on our consolidated balance sheet as of December 31, 2024 is associated with both our Retail Natural Gas and Retail Electricity reporting units.
Retail Electricity Segment Total revenues for the Retail Electricity Segment for the year ended December 31, 2023 were approximately $328.5 million, a decrease of approximately $24.3 million, or 7%, from approximately $352.8 million for the year ended December 31, 2022. This decrease was largely due to lower volumes sold, resulting in a decrease of $60.6 million.
Total revenues for the Retail Electricity Segment for the year ended December 31, 2023 decreased approximately $24.3 million, or 7%, from approximately $352.8 million for the year ended December 31, 2022. This decrease was largely due to lower volumes sold, resulting in a decrease of $60.6 million.
A dividend penalty event would occur if dividends on the Series A Preferred Stock are in arrears for six or more quarterly dividend periods, in which case the dividend rate on the Series A Preferred Stock would increase by 2.00% per annum, and the holders of the Series A Preferred Stock would be entitled to elect two members to our Board of Directors, until the dividend penalty event is cured. 67 Table of Contents Summary of Contractual Obligations The following table discloses aggregate information about our contractual obligations and commercial commitments as of December 31, 2023 (in millions): Total 2024 2025 2026 2027 2028 > 5 years Purchase obligations: Pipeline transportation agreements $ 9.2 $ 5.9 $ 1.6 $ 0.9 $ 0.6 $ 0.2 $ — Other purchase obligations (1) 16.4 6.0 5.1 5.3 — — — Total purchase obligations $ 25.6 $ 11.9 $ 6.7 $ 6.2 $ 0.6 $ 0.2 $ — Senior Credit Facility $ 97.0 $ — $ 97.0 $ — $ — $ — $ — Debt $ 97.0 $ — $ 97.0 $ — $ — $ — $ — (1) The amounts presented here include contracts for billing services and other software agreements to support our operations.
A dividend penalty event would occur if dividends on the Series A Preferred Stock are in arrears for six or more quarterly dividend periods, in which case the dividend rate on the Series A Preferred Stock would increase by 2.00% per annum, and the holders of the Series A Preferred Stock would be entitled to elect two members to our Board of Directors, until the dividend penalty event is cured. 58 Table of Contents Summary of Contractual Obligations The following table discloses aggregate information about our contractual obligations and commercial commitments as of December 31, 2024 (in millions): Total 2025 2026 2027 2028 2029 > 5 years Purchase obligations: Pipeline transportation agreements $ 5.6 $ 3.9 $ 0.9 $ 0.6 $ 0.2 $ — $ — Other purchase obligations (1) 7.8 5.3 2.3 0.2 — — — Total purchase obligations $ 13.4 $ 9.2 $ 3.2 $ 0.8 $ 0.2 $ — $ — Senior Credit Facility $ 106.0 $ — $ — $ 106.0 $ — $ — $ — Debt $ 106.0 $ — $ — $ 106.0 $ — $ — $ — (1) The amounts presented here include contracts for billing services and other software agreements to support our operations.
The Series A Preferred Stock will accrue dividends at an annual rate equal to the sum of (a) Three-Month LIBOR (if it then exists), or an alternative reference rate as of the applicable determination date and (b) 6.578%, based on the $25.00 liquidation preference per share of the Series A Preferred Stock. Following the cessation of the publication of U.S.
The Series A Preferred Stock will accrue dividends at an annual rate equal to the sum of (a) Three-Month LIBOR (if it then exists), or an alternative reference rate as of the applicable determination date and (b) 6.578%, based on the $25.00 liquidation preference per share of the Series A Preferred Stock.
For the years ended December 31, 2023, 2022 and 2021, approximately 75%, 76% and 81%, respectively, of our retail revenues were derived from the sale of electricity. • Retail Natural Gas Segment .
For the years ended December 31, 2024, 2023 and 2022, approximately 75%, 75% and 76%, respectively, of our retail revenues were derived from the sale of electricity. • Retail Natural Gas Segment .
Net asset optimization resulted in a loss of $7.3 million, $2.3 million of $4.2 million for the years ended December 31, 2023, 2022 and 2021, respectively. 53 Table of Contents Non-GAAP Performance Measures We use the Non-GAAP performance measures of Adjusted EBITDA and Retail Gross Margin to evaluate and measure our operating results.
Net asset optimization resulted in a loss of $2.3 million, $7.3 million and $2.3 million for the years ended December 31, 2024, 2023 and 2022, respectively. 45 Table of Contents Non-GAAP Performance Measures We use the Non-GAAP performance measures of Adjusted EBITDA and Retail Gross Margin to evaluate and measure our operating results.
This decrease was primarily due to lower volumes sold, resulting in a decrease of $46.4 million and a decrease of $15.2 million due to a change in the value of our retail derivative portfolio used in hedging and a credit of $9.6 million related to Winter Storm Uri received in 2022 that did not reoccur in 2023.
This decrease was primarily due to lower volumes sold, resulting in a decrease of $46.4 million and a decrease of $15.2 million due to a change in the value of our retail derivative portfolio used in hedging and a credit of $9.6 million related to winter storm Uri received in 2022 from ERCOT which did not reoccur again in 2023).
As of December 31, 2023, we had no material "off-balance sheet arrangements." 68 Table of Contents Related Party Transactions For a discussion of related party transactions, see Note 14 "Transactions with Affiliates" in the Company’s audited consolidated financial statements.
As of December 31, 2024, we had no material "off-balance sheet arrangements." 59 Table of Contents Related Party Transactions For a discussion of related party transactions, see Note 14 "Transactions with Affiliates" in the Company’s audited consolidated financial statements.
We completed our annual assessment of goodwill impairment at October 31, 2023, and the test indicated no impairment. 70 Table of Contents Deferred tax assets and liabilities The Company recognizes the amount of taxes payable or refundable for each tax year.
We completed our annual assessment of goodwill impairment at October 31, 2024, and the test indicated no impairment. 61 Table of Contents Deferred tax assets and liabilities The Company recognizes the amount of taxes payable or refundable for each tax year.
The decrease in cash flows used in financing activities was primarily due to a decrease in net paydown of our Senior Credit Facility of $32.0 million, a decrease in dividends paid to Class A common stockholders of $8.6 million, a decrease in distribution to non-controlling unitholders of $10.2 million, offset by net paydown of sub-debt of $20.0 million for the year ended December 31, 2023 compared to net borrowing of sub-debt of $20.0 million for the year ended December 31, 2022.
This was primarily due to a decrease in net paydown of our Senior Credit Facility of $32.0 million, a decrease in dividends paid to Class A common stockholders of $8.6 million, a decrease in distribution to non-controlling unitholders of $10.2 million, offset by net paydown of sub-debt of $20.0 million for the year ended December 31, 2023 compared to net borrowing of sub-debt of $20.0 million for the year ended December 31, 2022.
As of December 31, 2023, we operated in 104 utility service territories across 20 states and the District of Columbia. Our business consists of two operating segments: • Retail Electricity Segment .
As of December 31, 2024, we operated in 102 utility service territories across 20 states and the District of Columbia. Our business consists of two operating segments: • Retail Electricity Segment .
General and administrative expense for the year ended December 31, 2023 was approximately $68.9 million, an increase of approximately $7.0 million, or 11%, as compared to $61.9 million for the year ended December 31, 2022. This increase was primarily attributable to higher employee costs and an increase in sales and marketing due to increased sales activity.
General and administrative expense for the year ended December 31, 2023 increased approximately $7.0 million, or 11%, as compared to $61.9 million for the year ended December 31, 2022. This increase was primarily attributable to higher employee costs and an increase in sales and marketing due to increased sales activity. 51 Table of Contents Depreciation and Amortization Expense .
Our bad debt expense on non-POR revenues was as follows: Year Ended December 31, 2023 2022 2021 Total Non-POR Bad Debt as Percent of Revenue 1.7 % 3.0 % 0.2 % During the year ended December 31, 2023, we experienced lower credit loss expense versus 2022.
Our credit loss expense on non-POR revenues was as follows: Year Ended December 31, 2024 2023 2022 Total Non-POR Credit Loss as Percent of Revenue 1.3 % 1.7 % 3.0 % During the year ended December 31, 2024, we experienced lower credit loss expense versus 2023.
For each of the three years ended December 31, 2023, customer acquisition costs were as follows: Year Ended December 31, (In thousands) 2023 2022 2021 Customer Acquisition Costs $ 6,736 $ 5,870 $ 1,415 We strive to maintain a disciplined approach to recovery of our customer acquisition costs within a 12 month period.
For each of the three years ended December 31, 2024, customer acquisition costs were as follows: Year Ended December 31, (In thousands) 2024 2023 2022 Customer Acquisition Costs $ 9,508 $ 6,736 $ 5,870 We strive to maintain a disciplined approach to recovery of our customer acquisition costs within a 12 month period.
Amended and Restated Subordinated Debt Facility In connection with entering into the Senior Credit Facility, we entered into an amended and restated subordinated promissory note (the “Subordinated Debt Facility”), which allows us to draw advances in increments of no less than $1.0 million per advance up to $25.0 million through January 31, 2026. Borrowings are at the discretion of Retailco.
Amended and Restated Subordinated Debt Facility In connection with entering into the Senior Credit Facility, we entered into an amended and restated subordinated promissory note (the “Subordinated Debt Facility”), which allows us to draw advances in increments of no less than $1.0 million per advance up to $25.0 million through January 31, 2028.
Customer acquisition cost for the year ended December 31, 2023 was approximately $6.7 million, an increase of approximately $0.8 million, or 14%, from approximately $5.9 million for the year ended December 31, 2022. This increase was primarily due to increased sales activity in 2023 as compared to 2022.
Customer acquisition cost for the year ended December 31, 2024 was approximately $9.5 million, an increase of approximately $2.8 million, or 41%, from approximately $6.7 million for the year ended December 31, 2023. This increase was primarily due to increased sales activity in 2024 as compared to 2023.
(5) Retail Gross Margin for year ended December 31, 2022 includes a deduction of $9.6 million related to proceeds received under an ERCOT (winter storm Uri) securitization mechanism in June 2022. See further discussion below. Adjusted EBITDA .
(3) Retail Gross Margin for year ended December 31, 2022 includes a deduction of $9.6 million related to proceeds received under an ERCOT (winter storm Uri) securitization mechanism in June 2022. Adjusted EBITDA .
Depreciation and amortization expense for the year ended December 31, 2023 was approximately $9.1 million, a decrease of approximately $7.6 million, or 46%, from approximately $16.7 million for the year ended December 31, 2022. This decrease was primarily due to the decreased amortization expense associated with customer relationship intangibles.
Depreciation and amortization expense for the year ended December 31, 2023 decreased approximately $7.6 million, or 46%, from approximately $16.7 million for the year ended December 31, 2022. This decrease was primarily due to the decreased amortization expense associated with customer relationship intangibles. Customer Acquisition Cost .
Our marketing team continuously evaluates the effectiveness of each customer acquisition channel and makes adjustments in order to achieve desired targets. During the year ended December 31, 2023, we added approximately 140,000 RCEs through our various organic sales channels.
Our marketing team continuously evaluates the effectiveness of each customer acquisition channel and makes adjustments in order to achieve desired targets. 42 Table of Contents During the year ended December 31, 2024, we added approximately 127,000 RCEs through our various organic sales channels.
As a result, during the year ended December 31, 2023, Spark HoldCo made distributions of $3.6 million to our non-controlling interest holders related to the dividend payments to our Class A shareholders. In April 2023, we announced that our Board of Directors elected to temporarily suspend the quarterly cash dividend on the Class A common stock.
As a result, during the year ended December 31, 2024, Spark HoldCo made distributions of zero to our non-controlling interest holders related to the dividend payments to our Class A shareholders. 57 Table of Contents In April 2023, we announced that our Board of Directors elected to temporarily suspend the quarterly cash dividend on the Class A common stock.
Analysis of the impact of changes in prices and volumes between the years ended December 31, 2023, 2022, and 2021 are as follows: 2023 vs. 2022 2022 vs. 2021 Change in electricity volumes sold $ (46.4) $ (21.4) Change in natural gas volumes sold (2.1) 13.2 Change in electricity unit cost per MWh 17.3 65.6 Change in electricity unit cost per MWh - winter storm Uri 9.6 (74.8) Change in natural gas unit cost per MMBtu (12.5) 26.2 Change in value of retail derivative portfolio (13.8) 25.1 Change in other costs 1.5 — Change in retail cost of revenues $ (46.4) $ 33.9 General and Administrative Expense .
Analysis of the impact of changes in prices and volumes between the years ended December 31, 2024, 2023, and 2022 are as follows: 2024 vs. 2023 2023 vs. 2022 Change in electricity volumes sold $ 3.2 $ (46.4) Change in natural gas volumes sold 2.0 (2.1) Change in electricity unit cost per MWh (37.5) 17.3 Change in electricity unit cost per MWh - winter storm Uri — 9.6 Change in natural gas unit cost per MMBtu (14.2) (12.5) Change in value of retail derivative portfolio (33.3) (13.8) Change in other costs (0.1) 1.5 Change in retail cost of revenues $ (79.9) $ (46.4) General and Administrative Expense .
However, market conditions and regulatory constraints are making this increasingly difficult, and we are unable to predict future organic sales volumes at this time We also acquire companies and portfolios of customers through both external and affiliated channels. During the year ended December 31, 2023, we did not add any RCEs through acquisitions or asset purchase agreements.
However, market conditions and regulatory constraints are making this increasingly difficult, and we are unable to predict future organic sales volumes at this time. We also acquire companies and portfolios of customers through both external and affiliated channels. During the year ended December 31, 2024, we added 82,000 RCEs through acquisitions or asset purchase agreements.
Average monthly attrition rates during 2023, 2022 and 2021 were as follows: Year Ended Quarter Ended December 31 December 31 September 30 June 30 March 31 2021 3.3% 3.4% 2.4% 3.3% 4.2% 2022 3.8% 4.2% 4.0% 3.1% 3.7% 2023 3.4% 3.3% 3.1% 3.1% 3.9% Customer attrition during the year ended December 31, 2022 was higher than the year ended December 31, 2021 due to the sharp increase in commodity prices across the industry.
Average monthly attrition rates during 2024, 2023 and 2022 were as follows: Year Ended Quarter Ended December 31 December 31 September 30 June 30 March 31 2022 3.8% 4.2% 4.0% 3.1% 3.7% 2023 3.4% 3.3% 3.1% 3.1% 3.9% 2024 3.9% 4.0% 4.1% 3.4% 3.9% Customer attrition during the year ended December 31, 2023 was lower than the year ended December 31, 2022 due to a decrease in commodity prices across the industry.
Capital expenditures for the year ended December 31, 2023 included approximately $1.4 million related to information systems improvements. Dividends and Distributions For the year ended December 31, 2023, we paid $2.9 million in dividends to holders of our Class A common stock.
Capital expenditures for the year ended December 31, 2024 included approximately $1.6 million related to information systems improvements. Dividends and Distributions For the year ended December 31, 2024 , we paid $0.5 million in dividends to holders of our Class A common stock.
Total retail cost of revenues for the year ended December 31, 2023 was approximately $310.7 million, a decrease of approximately $46.4 million, or 13%, from approximately $357.1 million for the year ended December 31, 2022.
Total retail cost of revenues for the year ended December 31, 2023 decreased approximately $46.4 million, or 13%, from approximately $357.1 million for the year ended December 31, 2022.
During the year ended December 31, 2023, we paid $10.3 million of dividends to holders of our Series A Preferred Stock, and as of December 31, 2023, we had accrued $2.7 million related to dividends to holders of our Series A Preferred Stock, which we paid on January 16, 2024.
During the year ended December 31, 2024, we paid $10.9 million of dividends to holders of our Series A Preferred Stock, and as of December 31, 2024, we had accrued $2.4 million related to dividends to holders of our Series A Preferred Stock, which we paid on January 15, 2025.
This decrease was primarily due to a smaller customer book in 2023 compared to 2022. The volumes of natural gas sold increased from 8,611,285 MMBtu for the year ended December 31, 2021 to 11,558,952 MMBtu for the year ended December 31, 2022. This increase was primarily due to a larger customer book in 2022 compared to 2021.
This increase was primarily due to a larger customer book in 2024 compared to 2023. The volumes of natural gas sold decreased from 11,558,952 MMBtu for the year ended December 31, 2022 to 11,252,862 MMBtu for the year ended December 31, 2023. This decrease was primarily due to a smaller customer book in 2023 compared to 2022.
During the years ended December 31, 2023 and 2022, we spent a total of $6.7 million and $5.9 million, respectively, on organic customer acquisitions. Capital Expenditures Our capital requirements each year are relatively low and generally consist of minor purchases of equipment or information system upgrades and improvements.
During the years ended December 31, 2024 and 2023, we spent a total of 3.2 million and zero, respectively, on customer book acquisitions. Capital Expenditures Our capital requirements each year are relatively low and generally consist of minor purchases of equipment or information system upgrades and improvements.
This increase was primarily due to an increase in electricity unit revenue per MWh and higher natural gas volumes sold as a result of a larger natural gas customer book in 2022 as compared to 2021. 59 Table of Contents Analysis of the impact of changes in prices and volumes between the years ended December 31, 2023, 2022 and 2021 are as follows: 2023 vs. 2022 2022 vs. 2021 Change in electricity volumes sold $ (60.6) $ (30.5) Change in natural gas volumes sold (2.9) 25.6 Change in electricity unit revenue per MWh 36.3 61.4 Change in electricity unit revenue per MWh - winter storm Uri — (0.9) Change in natural gas unit revenue per MMBtu 3.7 9.5 Change in net asset optimization (expense) revenue (5.0) 1.9 Change in other revenue 3.2 — Change in total revenues $ (25.3) $ 67.0 Retail Cost of Revenues .
This decrease was primarily due to lower electricity volumes sold as a result of a smaller electricity customer book during 2023 as compared to 2022 offset by an increase in electricity unit revenue per MWh. 50 Table of Contents Analysis of the impact of changes in prices and volumes between the years ended December 31, 2024, 2023 and 2022 are as follows: 2024 vs. 2023 2023 vs. 2022 Change in electricity volumes sold $ 4.4 $ (60.6) Change in natural gas volumes sold 3.5 (2.9) Change in electricity unit revenue per MWh (32.6) 36.3 Change in natural gas unit revenue per MMBtu (15.3) 3.7 Change in net asset optimization (expense) revenue 5.0 (5.0) Change in other revenue (1.3) 3.2 Change in total revenues $ (36.3) $ (25.3) Retail Cost of Revenues .
(In thousands) Retail Electricity Retail Natural Gas Total % Net Annual Increase (Decrease) December 31, 2020 303 97 400 Additions 110 47 157 Attrition (115) (34) (149) December 31, 2021 298 110 408 2% Additions 40 46 86 Attrition (137) (26) (163) December 31, 2022 201 130 331 (19)% Additions 118 22 140 Attrition (102) (34) (136) December 31, 2023 217 118 335 1% 50 Table of Contents Customer attrition occurs primarily as a result of: (i) customer initiated switches; (ii) residential moves (iii) disconnection resulting from customer payment defaults and (iv) pro-active non-renewal of contracts.
(In thousands) Retail Electricity Retail Natural Gas Total % Net Annual Increase (Decrease) December 31, 2021 298 110 408 2% Additions 40 46 86 Attrition (137) (26) (163) December 31, 2022 201 130 331 (19)% Additions 118 22 140 Attrition (102) (34) (136) December 31, 2023 217 118 335 1% Additions 129 80 209 Attrition (114) (42) (156) December 31, 2024 232 156 388 16% Customer attrition occurs primarily as a result of: (i) customer initiated switches; (ii) residential moves (iii) disconnection resulting from customer payment defaults and (iv) pro-active non-renewal of contracts.
Retail Natural Gas Segment Total revenues for the Retail Natural Gas Segment for the year ended December 31, 2023 were approximately $110.9 million, an increase of approximately $0.8 million, or 1%, from approximately $110.1 million for the year ended December 31, 2022.
Total revenues for the Retail Natural Gas Segment for the year ended December 31, 2023 increased by approximately $0.8 million, or 1%, from approximately $110.1 million for the year ended December 31, 2022.
This decrease was primarily due to a smaller customer book during 2023. The volumes of electricity sold decreased from 2,677,681 MWh for the year ended December 31, 2021 to 2,433,906 MWh for the year ended December 31, 2022. This decrease was primarily due to a smaller customer book in 2022 as compared to 2021.
This increase was primarily due to a larger customer book during 2024. The volumes of electricity sold decreased from 2,433,906 MWh for the year ended December 31, 2022 to 2,008,947 MWh for the year ended December 31, 2023. This decrease was primarily due to a smaller customer book in 2023.
The decrease was primarily due to lower supply costs of $12.5 million, lower volumes of $2.1 million, offset by an increase of $1.4 million due to change in the fair value of our retail derivative portfolio used for hedging.
The decrease was primarily due to lower supply costs of $14.2 million, decrease of $12.8 million due to change in the fair value of our retail derivative portfolio used for hedging, offset by higher volumes of $2.0 million.
Cash Flows Our cash flows were as follows for the respective periods (in thousands): Year Ended December 31, 2023 2022 2021 Net cash provided by operating activities $ 49,315 $ 16,207 $ 12,702 Net cash used in by investing activities $ (1,435) $ (6,871) $ (6,510) Net cash used in financing activities $ (40,636) $ (49,305) $ (2,556) Cash Flows Provided by Operating Activities .
Cash Flows Our cash flows were as follows for the respective periods (in thousands): Year Ended December 31, 2024 2023 2022 Net cash provided by operating activities $ 50,484 $ 49,315 $ 16,207 Net cash used in by investing activities $ (4,727) $ (1,435) $ (6,871) Net cash used in financing activities $ (18,093) $ (40,636) $ (49,305) Cash Flows Provided by Operating Activities .
Retail gross margin for the Retail Natural Gas Segment for the year ended December 31, 2023 was approximately $47.5 million, an increase of approximately $15.4 million, or 48% from approximately $32.1 million for the year ended December 31, 2022, and 2022 decreased approximately $4.4 million or 12% from approximately $36.5 million for the year ended December 31, 2021 as indicated in the table below (in millions). 2023 vs. 2022 2022 vs. 2021 Change in volumes sold $ (0.8) $ 12.4 Change in unit margin per MMBtu 16.2 (16.8) Change in retail natural gas segment retail gross margin $ 15.4 $ (4.4) Natural Gas unit margins improved in 2023 compared to prior year primarily as a result of the lower natural cost supply costs in 2023.
The decrease was primarily due to lower supply costs of $12.5 million, lower volumes of $2.1 million, offset by an increase of $1.4 million due to change in the fair value of our retail derivative portfolio used for hedging. 54 Table of Contents Retail gross margin for the Retail Natural Gas Segment for the year ended December 31, 2024 was approximately $47.9 million, an increase of approximately $0.4 million, or 1% from approximately $47.5 million for the year ended December 31, 2023, and 2023 increased approximately $15.4 million or 48% from approximately $32.1 million for the year ended December 31, 2022 as indicated in the table below (in millions). 2024 vs. 2023 2023 vs. 2022 Change in volumes sold $ 1.5 $ (0.8) Change in unit margin per MMBtu (1.1) 16.2 Change in retail natural gas segment retail gross margin $ 0.4 $ 15.4 Natural Gas unit margins decreased in 2024 compared to prior year primarily as a result of the lower natural gas prices in 2024.
Cash flows used in investing activities decreased by $5.4 million for the year ended December 31, 2023. The decrease was primarily the result of customer acquisitions during the year ended December 31, 2022 that did not re-occur in 2023. Cash flows used in investing activities increased by $0.4 million for the year ended December 31, 2022.
The decrease was primarily the result of customer acquisitions during the year ended December 31, 2022 that did not reoccur in 2023. Cash Flows Used in Financing Activities . Cash flows used in financing activities decreased by $22.5 million for the year ended December 31, 2024.
Retail gross margin for the Retail Electricity Segment for the year ended December 31, 2023 was approximately $87.6 million, an increase of approximately $4.8 million, or 6%, as compared to the year ended December 31, 2022, and 2022 decreased approximately $13.3 million or 14% as compared to December 31, 2021 as indicated in the table below (in millions). 2023 vs. 2022 2022 vs. 2021 Change in volumes sold $ (14.2) $ (3.0) Change in gross margin - winter storm Uri — (64.4) Change in unit margin per MWh 19.0 54.1 Change in retail electricity segment retail gross margin $ 4.8 $ (13.3) Electricity unit margin improved in 2023 compared to prior year as a result of higher electricity prices resulting in higher unit margin per MWh sold.
Retail gross margin for the Retail Electricity Segment for the year ended December 31, 2024 was approximately $93.7 million, an increase of approximately $6.1 million, or 7%, as compared to the year ended December 31, 2023, and 2023 increased approximately $4.8 million or 6% as compared to December 31, 2022 as indicated in the table below (in millions). 2024 vs. 2023 2023 vs. 2022 Change in volumes sold $ 1.2 $ (14.2) Change in unit margin per MWh 4.9 19.0 Change in retail electricity segment retail gross margin $ 6.1 $ 4.8 Electricity unit margin improved in 2024 compared to prior year as a result of lower electricity cost resulting in higher unit margin per MWh sold.
Year Ended December 31, (in thousands) 2023 2022 2021 Reconciliation of Adjusted EBITDA to net cash provided by operating activities: Net cash provided by operating activities $ 49,315 $ 16,207 $ 12,702 Amortization of deferred financing costs (825) (1,125) (997) Bad debt expense (3,442) (6,865) (445) Interest expense 9,334 7,204 4,926 Income tax expense 11,142 6,483 5,266 Non-recurring event - winter storm Uri — (5,162) 60,000 Non-recurring legal settlement — — (2,225) Merger agreement expense 752 — — Changes in operating working capital Accounts receivable, prepaids, current assets (17,159) 34,731 (5,117) Inventory (1,281) 2,423 486 Accounts payable, accrued liabilities, current liabilities 15,206 (884) 11,253 Other (6,187) (1,219) (5,192) Adjusted EBITDA $ 56,855 $ 51,793 $ 80,657 Cash Flow Data: Cash flows provided by operating activities $ 49,315 $ 16,207 $ 12,702 Cash flows used in investing activities $ (1,435) $ (6,871) $ (6,510) Cash flows used in financing activities $ (40,636) $ (49,305) $ (2,556) Retail Gross Margin.
Year Ended December 31, (in thousands) 2024 2023 2022 Reconciliation of Adjusted EBITDA to net cash provided by operating activities: Net cash provided by operating activities $ 50,484 $ 49,315 $ 16,207 Amortization of deferred financing costs (852) (825) (1,125) Bad debt expense (2,469) (3,442) (6,865) Interest expense 6,943 9,334 7,204 Income tax expense 16,259 11,142 6,483 Non-recurring event - winter storm Uri — — (5,162) Merger agreement expense 2,383 752 — Changes in operating working capital Accounts receivable, prepaids, current assets (734) (17,159) 34,731 Inventory (987) (1,281) 2,423 Accounts payable, accrued liabilities, current liabilities (3,380) 15,206 (884) Other (9,066) (6,187) (1,219) Adjusted EBITDA $ 58,581 $ 56,855 $ 51,793 Cash Flow Data: Cash flows provided by operating activities $ 50,484 $ 49,315 $ 16,207 Cash flows used in investing activities $ (4,727) $ (1,435) $ (6,871) Cash flows used in financing activities $ (18,093) $ (40,636) $ (49,305) Retail Gross Margin.
Management compensates for the limitations of Adjusted EBITDA and Retail Gross Margin as analytical tools by reviewing the comparable GAAP measures, understanding the differences between the measures and incorporating these data points into management’s decision-making process. 58 Table of Contents Consolidated Results of Operations (In Thousands) Year Ended December 31, 2023 2022 2021 Revenues: Retail revenues $ 439,360 $ 462,815 $ 397,728 Net asset optimization expense (7,326) (2,322) (4,243) Other revenue 3,158 — — Total Revenues 435,192 460,493 393,485 Operating Expenses: Retail cost of revenues 310,744 357,096 323,219 General and administrative expense 68,874 61,933 44,279 Depreciation and amortization 9,102 16,703 21,578 Total Operating Expenses 388,720 435,732 389,076 Operating income 46,472 24,761 4,409 Other (expense)/income: Interest expense (9,334) (7,204) (4,926) Interest and other income 109 129 370 Total Other (Expenses)/Income (9,225) (7,075) (4,556) Income (loss) before income tax expense 37,247 17,686 (147) Income tax expense 11,142 6,483 5,266 Net income (loss) $ 26,105 $ 11,203 $ (5,413) Other Performance Metrics: Adjusted EBITDA (1) (2) (5) $ 56,855 $ 51,793 $ 80,657 Retail Gross Margin (1) (3)(4) $ 136,650 $ 114,815 $ 132,534 Customer Acquisition Costs $ 6,736 $ 5,870 $ 1,415 RCE Attrition 3.4 % 3.8 % 3.3 % Distributions paid to Class B non-controlling unit holders and dividends paid to Class A common shareholders $ (7,182) $ (26,014) $ (28,423) (1) Adjusted EBITDA and Retail Gross Margin are non-GAAP financial measures.
Management compensates for the limitations of Adjusted EBITDA and Retail Gross Margin as analytical tools by reviewing the comparable GAAP measures, understanding the differences between the measures and incorporating these data points into management’s decision-making process. 49 Table of Contents Consolidated Results of Operations (In Thousands) Year Ended December 31, 2024 2023 2022 Revenues: Retail revenues $ 399,418 $ 439,360 $ 462,815 Net asset optimization expense (2,326) (7,326) (2,322) Other revenue 1,776 3,158 — Total Revenues 398,868 435,192 460,493 Operating Expenses: Retail cost of revenues 230,791 310,744 357,096 General and administrative expense 74,453 68,874 61,933 Depreciation and amortization 9,446 9,102 16,703 Total Operating Expenses 314,690 388,720 435,732 Operating income 84,178 46,472 24,761 Other (expense)/income: Interest expense (6,943) (9,334) (7,204) Interest and other income 99 109 129 Total Other (Expenses)/Income (6,844) (9,225) (7,075) Income before income tax expense 77,334 37,247 17,686 Income tax expense 16,259 11,142 6,483 Net income $ 61,075 $ 26,105 $ 11,203 Other Performance Metrics: Adjusted EBITDA (1) (2) $ 58,581 $ 56,855 $ 51,793 Retail Gross Margin (1) (3) $ 141,996 $ 136,650 $ 114,815 Customer Acquisition Costs $ 9,508 $ 6,736 $ 5,870 RCE Attrition 3.9 % 3.4 % 3.8 % Distributions paid to Class B non-controlling unit holders and dividends paid to Class A common shareholders $ (10,664) $ (7,182) $ (26,014) (1) Adjusted EBITDA and Retail Gross Margin are non-GAAP financial measures.
See Note 9 "Debt" for further information regarding the extension of the Subordinated Debt Facility. Uses of Liquidity and Capital Resources Repayment of Current Portion of Senior Credit Facility Our Senior Credit Facility matures in June 2025, and no amounts are due currently.
See Note 9 "Debt" in the notes to our condensed consolidated financial statements for further information. Uses of Liquidity and Capital Resources Repayment of Current Portion of Senior Credit Facility Our Senior Credit Facility matures in June 2027, and no amounts are due currently.
Total revenues for the year ended December 31, 2023 were approximately $435.2 million, a decrease of approximately $25.3 million, or 5%, from approximately $460.5 million for the year ended December 31, 2022.
Total revenues for the year ended December 31, 2023 decreased approximately $25.3 million, or 5%, from approximately $460.5 million for the year ended December 31, 2022.
Cash flows used in financing activities increased by $46.7 million for the year ended December 31, 2022.
Cash flows used in financing activities decreased by $8.7 million for the year ended December 31, 2023.
Dividends on the Series A Preferred Stock will be paid on April 15, 2024 to holders of record on April 1, 2024. The Board of Directors may be required to reduce, eliminate or suspend quarterly cash dividends to the holders of the Series A Preferred Stock.
The Board of Directors may be required to reduce, eliminate or suspend quarterly cash dividends to the holders of the Series A Preferred Stock.
We have historically included the financial impact of weather variability in the calculation of Retail Gross Margin.
We have historically included the financial impact of weather variability in the calculation of Adjusted EBITDA.
The following table presents a reconciliation of Adjusted EBITDA to these GAAP measures for each of the periods indicated. 55 Table of Contents Year Ended December 31, (in thousands) 2023 2022 2021 Reconciliation of Adjusted EBITDA to Net Income (Loss): Net income (loss) $ 26,105 $ 11,203 $ (5,413) Depreciation and amortization 9,102 16,703 21,578 Interest expense 9,334 7,204 4,926 Income tax expense 11,142 6,483 5,266 EBITDA 55,683 41,593 26,357 Less: Net, (loss) gain on derivative instruments (71,493) 17,821 21,200 Net, cash settlements on derivative instruments 66,632 (35,801) (15,692) Customer acquisition costs 6,736 5,870 1,415 Plus: Non-cash compensation expense 2,295 3,252 3,448 Non-recurring event - winter storm Uri — (5,162) 60,000 Non-recurring legal and regulatory settlements — — (2,225) Merger agreement expense 752 — — Adjusted EBITDA $ 56,855 $ 51,793 $ 80,657 56 Table of Contents The following table presents a reconciliation of Adjusted EBITDA to net cash provided by operating activities for each of the periods indicated.
Year Ended December 31, (in thousands) 2024 2023 2022 Reconciliation of Adjusted EBITDA to Net Income: Net income $ 61,075 $ 26,105 $ 11,203 Depreciation and amortization 9,446 9,102 16,703 Interest expense 6,943 9,334 7,204 Income tax expense 16,259 11,142 6,483 EBITDA 93,723 55,683 41,593 Less: Net, (loss) gain on derivative instruments (3,720) (71,493) 17,821 Net, cash settlements on derivative instruments 34,148 66,632 (35,801) Customer acquisition costs 9,508 6,736 5,870 Plus: Non-cash compensation expense 2,411 2,295 3,252 Non-recurring event - winter storm Uri — — (5,162) Merger agreement expense 2,383 752 — Adjusted EBITDA $ 58,581 $ 56,855 $ 51,793 47 Table of Contents The following table presents a reconciliation of Adjusted EBITDA to net cash provided by operating activities for each of the periods indicated.
See discussion below. (2) Adjusted EBITDA for the year ended December 31, 2022 includes a deduction of $5.2 million related to proceeds received under an ERCOT (winter storm Uri) securitization mechanism in June 2022. See further discussion below. (3) Adjusted EBITDA for the year ended December 31, 2023 includes a $0.8 million add back related to merger agreement expense.
(2) Adjusted EBITDA for the year ended December 31, 2022 includes a deduction of $5.2 million related to proceeds received under an ERCOT (winter storm Uri) securitization mechanism in June 2022.
Adjusted EBITDA and Retail Gross Margin are not presentations made in accordance with GAAP and have limitations as analytical tools. You should not consider Adjusted EBITDA or Retail Gross Margin in isolation or as a substitute for analysis of our results as reported under GAAP.
You should not consider Adjusted EBITDA or Retail Gross Margin in isolation or as a substitute for analysis of our results as reported under GAAP.
(4) Retail Gross Margin for the year ended December 31, 2022 includes a deduction of $9.6 million non-recurring credit related to winter storm Uri add back in 2021. (5) Adjusted EBITDA for the year ended December 31, 2023 includes a $0.8 million add back related to merger agreement expense. Total Revenues.
See " — Non-GAAP Performance Measures" for a reconciliation of Adjusted EBITDA and Retail Gross Margin to their most directly comparable GAAP financial measures (2) Adjusted EBITDA for the year ended December 31, 2024 and December 31, 2023 includes $2.4 million and $0.8 million add back related to merger agreement expense, respectively. .(3) Retail Gross Margin for the year ended December 31, 2022 includes a deduction of $9.6 million non-recurring credit related to winter storm Uri add back in 2021.
The following table shows our RCEs by segment as of December 31, 2023, 2022 and 2021: RCEs: December 31, (In thousands) 2023 2022 2021 Retail Electricity 217 201 298 Retail Natural Gas 118 130 110 Total Retail 335 331 408 The following table details our count of RCEs by geographical location as of December 31, 2023: RCEs by Geographic Location: (In thousands) Electricity % of Total Natural Gas % of Total Total % of Total New England 64 29% 12 10% 76 23% Mid-Atlantic 95 44% 51 43% 146 44% Midwest 20 9% 20 17% 40 12% Southwest 38 18% 35 30% 73 21% Total 217 100% 118 100% 335 100% The geographical locations noted above include the following states: • New England - Connecticut, Maine, Massachusetts and New Hampshire; 49 Table of Contents • Mid-Atlantic - Delaware, Maryland (including the District of Columbia), New Jersey, New York, Pennsylvania and Virginia; • Midwest - Illinois, Indiana, Michigan and Ohio; and • Southwest - Arizona, California, Colorado, Florida, Nevada and Texas.
The following table shows our RCEs by segment as of December 31, 2024, 2023 and 2022: RCEs: December 31, (In thousands) 2024 2023 2022 Retail Electricity 232 217 201 Retail Natural Gas 156 118 130 Total Retail 388 335 331 The following table details our count of RCEs by geographical location as of December 31, 2024: RCEs by Geographic Location: (In thousands) Electricity % of Total Natural Gas % of Total Total % of Total New England 53 23% 13 9% 66 17% Mid-Atlantic 118 51% 52 33% 170 44% Midwest 24 10% 24 15% 48 12% Southwest 37 16% 67 43% 104 27% Total 232 100% 156 100% 388 100% The geographical locations noted above include the following states: • New England - Connecticut, Maine, Massachusetts and New Hampshire; • Mid-Atlantic - Delaware, Maryland (including the District of Columbia), New Jersey, New York, Pennsylvania and Virginia; • Midwest - Illinois, Indiana, Michigan and Ohio; and • Southwest - Arizona, California, Colorado, Florida, Nevada and Texas.
The following table presents a reconciliation of Retail Gross Margin to gross profit for each of the periods indicated. 57 Table of Contents Year Ended December 31, (in thousands) 2023 2022 2021 Reconciliation of Retail Gross Margin to Gross Profit: Total Revenues $ 435,192 $ 460,493 $ 393,485 Less: Retail cost of revenues 310,744 357,096 323,219 Gross Profit $ 124,448 $ 103,397 $ 70,266 Less: Net asset optimization expense (7,326) (2,322) (4,243) Net, (loss) gain on non-trading derivative instruments (70,304) 17,305 22,130 Net, cash settlements on non-trading derivative instruments 65,428 (35,966) (15,752) Non-recurring event - winter storm Uri — 9,565 (64,403) Retail Gross Margin $ 136,650 $ 114,815 $ 132,534 Retail Gross Margin - Retail Electricity Segment (1)(2) $ 87,566 $ 82,749 $ 96,009 Retail Gross Margin - Retail Natural Gas Segment $ 47,489 $ 32,066 $ 36,525 Retail Gross Margin - Other $ 1,595 $ — $ — (1) Retail Gross Margin for the year ended December 31, 2021 includes a $0.5 million reduction related to the winter storm Uri credit settlements received and includes a $64.4 million add back related to winter storm Uri.
The following table presents a reconciliation of Retail Gross Margin to gross profit for each of the periods indicated. 48 Table of Contents Year Ended December 31, (in thousands) 2024 2023 2022 Reconciliation of Retail Gross Margin to Gross Profit: Total Revenues $ 398,868 $ 435,192 $ 460,493 Less: Retail cost of revenues 230,791 310,744 357,096 Gross Profit $ 168,077 $ 124,448 $ 103,397 Less: Net asset optimization expense (2,326) (7,326) (2,322) Net, (loss) gain on non-trading derivative instruments (4,464) (70,304) 17,305 Net, cash settlements on non-trading derivative instruments 32,871 65,428 (35,966) Non-recurring event - winter storm Uri — — 9,565 Retail Gross Margin $ 141,996 $ 136,650 $ 114,815 Retail Gross Margin - Retail Electricity Segment (1) $ 93,669 $ 87,566 $ 82,749 Retail Gross Margin - Retail Natural Gas Segment $ 47,865 $ 47,489 $ 32,066 Retail Gross Margin - Other $ 462 $ 1,595 $ — (1) Retail Gross Margin for year ended December 31, 2022 includes a deduction of $9.6 million related to proceeds received under an ERCOT (winter storm Uri) securitization mechanism in June 2022.
Refer to Note 16 “Customer Acquisitions” for further discussion. Our ability to realize returns from acquisitions that are acceptable to us is dependent on our ability to successfully identify, negotiate, finance and integrate acquisitions. We will continue to evaluate potential acquisitions during 2024.
Refer to Note 16 “Customer Acquisitions” for further discussion. Our ability to realize returns from acquisitions that are acceptable to us is dependent on our ability to successfully identify, negotiate, finance and integrate acquisitions. RCE Activity The following table shows our RCE activity during the years ended December 31, 2024, 2023 and 2022.
For a description of the terms and conditions of our Senior Credit Facility, including descriptions of the interest rate, commitment fee, covenants and terms of default, please see Note 9 "Debt" in the notes to our condensed consolidated financial statements. As of December 31, 2023, we were in compliance with the covenants under our Senior Credit Facility.
As of December 31, 2024, we had total commitments of $205.0 million under our Senior Credit Facility, of which $131.6 million was outstanding, including $25.6 million of outstanding letters of credit. 56 Table of Contents For a description of the terms and conditions of our Senior Credit Facility, including descriptions of the interest rate, commitment fee, covenants and terms of default, please see Note 9 "Debt" in the notes to our condensed consolidated financial statements.
Unit margins were negatively impacted in 2022 compared to prior year primarily as a result of the higher natural cost supply costs due to higher commodity price environment in 2022. The volumes of natural gas sold decreased from 11,558,952 MMBtu for the year ended December 31, 2022 to 11,252,862 MMBtu for the year ended December 31, 2023.
Natural Gas unit margins improved in 2023 compared to prior year primarily as a result of the lower natural cost supply costs in 2023. The volumes of natural gas sold increased from 11,252,862 MMBtu for the year ended December 31, 2023 to 11,603,745 MMBtu for the year ended December 31, 2024.
Our customer growth strategy includes growing organically through traditional sales channels complemented by customer portfolio and business acquisitions. We measure our number of customers using residential customer equivalents ("RCEs").
Customer Growth Customer growth is a key driver of our operations. Our ability to acquire customers organically or by acquisition is important to our success as we experience ongoing customer attrition. Our customer growth strategy includes growing organically through traditional sales channels complemented by customer portfolio and business acquisitions. We measure our number of customers using residential customer equivalents ("RCEs").
The increase was primarily the result of increases related to customer acquisitions for the year ended December 31, 2022. Cash Flows Used in Financing Activities . Cash flows used in financing activities decreased by $8.7 million for the year ended December 31, 2023.
Cash flows used in investing activities increased by $3.3 million for the year ended December 31, 2024. The increase was primarily the result of customer acquisitions during the year ended December 31, 2024. Cash flows used in investing activities decreased by $5.4 million for the year ended December 31, 2023.
This decrease was primarily due to lower electricity volumes sold as a result of a smaller electricity customer book during 2023 as compared to 2022 offset by an increase in electricity unit revenue per MWh.
This decrease was primarily due to lower electricity and gas unit revenue as a result of decreased electricity and gas rates, partially offset by higher electricity and gas volumes sold as a result of a larger electricity and gas customer book during 2024 as compared to 2023.
This was offset by an increase in electricity costs of $65.6 million due to higher commodity price environment in 2022 and by an increase of $21.5 million due to a change in the value of our retail derivative portfolio used in hedging.
This decrease was primarily due to lower electricity costs of $37.5 million due to lower commodity price environment in 2024, a change in the value of our retail derivative portfolio used in hedging of $20.5 million, partially offset by higher volumes sold, resulting in a increase of $3.2 million.
Retail cost of revenues for the Retail Natural Gas Segment for the year ended December 31, 2022 increased approximately $43.0 million, or 112%, from approximately $38.4 million for the year ended December 31, 2021.
Retail cost of revenues for the Retail Natural Gas Segment for the year ended December 31, 2023, a decreased approximately $13.2 million, or 16%, from approximately $81.4 million for the year ended December 31, 2022.
Based upon existing covenants as of December 31, 2023, we had availability to borrow up to $48.4 million under the Senior Credit Facility. Maintaining compliance with our covenants under our Senior Credit Facility may impact our ability to pay dividends on our Series A Preferred Stock.
As of December 31, 2024, we were in compliance with the covenants under our Senior Credit Facility. Based upon existing covenants as of December 31, 2024, we had availability to borrow up to $73.4 million under the Senior Credit Facility.
These measures for the three years ended December 31, 2023 were as follows: Year Ended December 31, (in thousands) 2023 2022 2021 Adjusted EBITDA (1)(2)(3) $ 56,855 $ 51,793 $ 80,657 Retail Gross Margin (4)(5) $ 136,650 $ 114,815 $ 132,534 (1) Adjusted EBITDA for the year ended December 31, 2021 includes a $60.0 million add back related to winter storm Uri and also includes a deduction of $2.2 million non-recurring legal settlement related to an add back in 2019.
These measures for the three years ended December 31, 2024 were as follows: Year Ended December 31, (in thousands) 2024 2023 2022 Adjusted EBITDA (1)(2) $ 58,581 $ 56,855 $ 51,793 Retail Gross Margin (3) $ 141,996 $ 136,650 $ 114,815 (1) Adjusted EBITDA for the year ended December 31, 2024 and December 31, 2023 includes $2.4 million and 0.8 million add back related to merger agreement expense, respectively.
However, due to the revolving nature of the facility, excess cash available is generally used to reduce the balance outstanding, which at December 31, 2023 was $97.0 million.
However, due to the revolving nature of the facility, excess cash available is generally used to reduce the balance outstanding, which at December 31, 2024 was $131.6 million, including $25.6 million of outstanding letters of credit. The current variable interest rate on the facility at December 31, 2024 was 7.59%.
Our risk management policies direct that we hedge substantially all of our forecasted demand, which is typically hedged to long-term normal weather patterns. We also attempt to add additional protection through hedging from time to time to protect us from potential volatility in markets where we have historically experienced higher exposure to extreme weather conditions.
We also attempt to add additional protection through hedging from time to time to protect us from potential volatility in markets where we have historically experienced higher exposure to extreme weather conditions.
Our hedging strategy is based on forecasted customer energy usage, which can vary substantially as a result of weather patterns deviating from historical norms. We are particularly sensitive to this variability in our residential customer segment where energy usage is highly sensitive to weather conditions that impact heating and cooling demand.
Our hedging strategy is based on forecasted customer energy usage, which can vary substantially as a result of weather patterns deviating from historical norms.
We expect our customer growth to continue to increase, however, we are unable to predict the ultimate effect of market conditions on our organic sales, financial results, cash flows, and liquidity at this time. In December 2023, the FCC adopted rules that could limit the ability of third-party lead generators to identify large numbers of potential customers.
We expect our customer growth to continue to increase, however, we are unable to predict the ultimate effect of market conditions on our organic sales, financial results, cash flows, and liquidity at this time. We continue to target customer growth and seek to increase our customer growth to more historical levels.
This decrease was partially offset by higher electricity prices, resulting in an increase of $36.3 million. Total revenues for the Retail Electricity Segment for the year ended December 31, 2022 increased approximately $30.2 million, or 9%, from approximately $322.6 million for the year ended December 31, 2021.
This decrease was partially offset by higher electricity prices, which resulted in an increase of $36.3 million. 53 Table of Contents Retail cost of revenues for the Retail Electricity Segment for the year ended December 31, 2024 was approximately $186.2 million, a decrease of approximately $54.8 million, or 23%, from approximately $241.0 million for the year ended December 31, 2023.
Depreciation and amortization expense for the year ended December 31, 2022 decreased approximately $4.9 million, or 23%, from approximately $21.6 million for the year ended December 31, 2021. This decrease was primarily due to the decreased amortization expense associated with customer relationship intangibles. Customer Acquisition Cost .
Depreciation and amortization expense for the year ended December 31, 2024 was approximately $9.4 million, an increase of approximately $0.3 million, or 4%, from approximately $9.1 million for the year ended December 31, 2023. This increase was primarily due to the increased amortization expense associated with customer relationship intangibles that were acquired in 2024 .
Unit margins were negatively impacted in 2022 compared to prior year primarily as a result of the higher electricity cost due to higher commodity price environment in 2022. The volumes of electricity sold decreased from 2,433,906 MWh for the year ended December 31, 2022 to 2,008,947 MWh for the year ended December 31, 2023.
Unit margins improved in 2023 compared to prior year as a result of higher electricity prices resulting and higher unit margin per MWh sold. The volumes of electricity sold increased from 2,008,947 MWh for the year ended December 31, 2023 to 2,035,597 MWh for the year ended December 31, 2024.
Total revenues for the year ended December 31, 2022 increased approximately $67.0 million, or 17%, from approximately $393.5 million for the year ended December 31, 2021.
Customer acquisition cost for the year ended December 31, 2023 increased approximately $0.8 million, or 14% from approximately $5.9 million for the year ended December 31, 2022.