Renewable Energy - Solar / Wind Asset Capitalization at Commercial Operation
Capitalizing the total cost of a utility-scale solar or wind project upon achieving Commercial Operation Date (COD), including EPC contract costs, interconnection costs, and pre-operational costs.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Electric Plant in Service - Solar Production (FERC Acct 341) | Asset (+) | 485,000,000.00 | - |
| Construction Work in Progress - Solar Project (FERC Acct 107) | Asset (-) | - | 448,000,000.00 |
| AFUDC - Accumulated During Construction (Included in Asset) | Asset (-) | - | 37,000,000.00 |
💡 Accountant's Note
Utility-scale solar and wind projects are capitalized as Electric Plant in Service upon commercial operation. Capitalizable costs include: EPC (Engineering, Procurement, Construction) contract payments, interconnection facilities, land rights (easements, leases), permitting costs, development costs, and accumulated AFUDC. For regulated utilities, the plant enters the rate base and begins earning an authorized return. For unregulated generators (merchant power), the asset is depreciated per ASC 360 with no regulatory treatment. Solar assets are classified in FERC Account 341 (Solar and Wind); other renewables use FERC Account 344.
Practitioner & Systems Framework
💻 ERP Architecture
Commercial Operation Date (COD) triggers: (1) cessation of AFUDC accrual, (2) commencement of depreciation, (3) transfer of CWIP to plant in service, and (4) beginning of rate base inclusion (for regulated assets). COD requires a formal technical determination — typically based on the unit reaching a sustained power output level and completing all testing. Document the COD determination carefully as it affects rate case timing.
⚠️ Audit Flags
Auditors verify the COD determination for correct depreciation start date. Premature COD recognition accelerates rate base and depreciation — an issue if project commissioning is not actually complete. The capitalization of development costs (pre-construction) requires analysis: costs for projects that are abandoned must be expensed. ITC qualification depends on when the project is 'placed in service' — an IRS concept that may differ from FERC COD.
📄 Required Documentation
EPC contract and final cost reconciliation, interconnection agreement, COD certification from plant engineer, FERC account classification analysis, land rights documentation, CWIP-to-plant transfer workpaper, ITC qualification analysis (if applicable).
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