Smart Meter / AMI Infrastructure - Mass Capitalization of Advanced Metering
Capitalizing the mass deployment of Advanced Metering Infrastructure (AMI / Smart Meters) system-wide, including hardware, installation labor, data communications network, and back-office system integration.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Electric Plant in Service - Meters (FERC Acct 370) | Asset (+) | 485,000,000.00 | - |
| Electric Plant in Service - Metering Comms Network (FERC Acct 371) | Asset (+) | 95,000,000.00 | - |
| Construction Work in Progress (AMI Project - Transferred) | Asset (-) | - | 580,000,000.00 |
💡 Accountant's Note
AMI deployments are among the largest capital programs in utility history — replacing every customer meter in the service territory with a smart meter that provides 15-minute interval data. Capital costs include: smart meter hardware ($150–$400/unit × millions of customers), installation labor, the data communications network (RF mesh, cellular, or PLC), head-end software systems, and integration with the billing system. FERC Account 370 covers meters; Account 371 covers meter installations; communications infrastructure may go to Distribution or General Plant accounts. PUC pre-approval of the AMI business case is typically required before deployment.
Practitioner & Systems Framework
💻 ERP Architecture
The mass AMI deployment requires project accounting that tracks costs by unit type, installation batch, and geographic area. Old meter retirements must be processed simultaneously — removing old meter book values from Account 370 and accumulated depreciation. Labor capitalization rules (what percentage of project management, IT, and field labor is capitalizable) must be documented in a project cost capitalization policy.
⚠️ Audit Flags
AMI capitalization is a high-risk audit area due to the volume of transactions and the labor cost allocation. Auditors test: (1) capital vs. expense classification of each cost category, (2) proper retirement of old meters simultaneously with new meter installations, (3) reasonableness of labor capitalization rates, (4) completion testing to confirm smart meters are fully functional before transfer from CWIP. Some utilities have improperly deferred retirement of old meters — overstating total plant balances.
📄 Required Documentation
AMI business case and PUC approval, project cost breakdown by category, labor capitalization policy, installation completion records (by geographic batch), old meter retirement records, communications network acceptance testing, billing system integration acceptance.
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