Megawatt hours generated increased from approximately 1,991,030 MWh for the nine months ended September 30, 2021, to approximately 2,894,224 MWh for the nine months ended September 30, 2022, primarily due to the increased number of operating solar energy systems in our fleet.
Megawatt hours generated increased from approximately 2,033,126 MWh for the year ended December 31, 2020, to approximately 2,417,803 MWh for the year ended December 31, 2021, primarily due to the increased number of operating solar energy systems in our fleet.
Megawatt Capacity
Megawatt capacity represents the maximum output of electricity produced during the period indicated.
Megawatt capacity increased from approximately 1,482 MW as of September 30, 2021, to approximately 2,038 MW as of September 30, 2022, primarily due to the increased number of operating solar energy systems in our fleet.
Megawatt capacity increased from approximately 1,455 MW as of December 31, 2020, to approximately 1,709 MW as of December 31, 2021, primarily due to the increased number of operating solar energy systems in our fleet.
Storage
Megawatt Hours Capacity of Energy Storage
Megawatt hours capacity of energy storage represents the total amount of energy that can be discharged by the energy storage systems in our fleet.
Megawatt hours capacity of energy storage increased from approximately 4 MWh as of September 30, 2021, to approximately 1,065 MWh as of September 30, 2022, primarily due to the increased number of operating energy storage systems in our fleet.
Megawatt hours capacity of energy storage increased from approximately 4 MWh as of December 31, 2020, to approximately 504 MWh as of December 31, 2021, primarily due to the increased number of operating energy storage systems in our fleet.
Non-GAAP Financial Measures
Adjusted EBITDA is net income (loss) before interest expense, net, (gain) loss on tax equity sale-leaseback buyouts and acquisitions, gain on termination of purchase obligation, legal settlements, loss on extinguishment of debt, income tax (benefit) expense, depreciation, amortization and accretion, restructuring and offering costs, contract amortization and acquisition and development costs. We define Project Contribution Margin as gross margin, adding contract amortization and depreciation, amortization and accretion expense, less operations and maintenance, excluding depreciation, amortization and accretion.
See “Summary Historical and Pro Forma Condensed Consolidated Financial and Operational Data—Non-GAAP Financial Measures” for additional information, including reconciliations to net income (loss) and operating revenues, the most directly comparable GAAP measures, respectively.
Principal Sources of Our Operating Revenues
We derive our operating revenues principally from the sale of electricity and solar renewable energy certificates.
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