For a self-consumption photovoltaic (PV) installation, IPMVP proposes a modified approach: savings equal the PV energy consumed on site (self-consumption) plus the revenue from exported surplus, both quantified using two meters (PV production and grid import).

M&V on self-consumption PV requires explicitly metering PV production at the inverter and grid import at the point of supply. Total site consumption is derived as PV production plus grid import, self-consumption is PV production minus exported surplus, and monetary savings combine avoided purchase cost (self-consumption times retail tariff) with surplus times feed-in tariff. Routine adjustments still apply, mainly solar irradiation (solar degree-days) and occupancy, just as in a conventional Option B/C project. EVO publishes a dedicated renewable-energy addendum to IPMVP covering these PV-specific accounting rules.

Insist on a bidirectional grid meter rather than two unidirectional ones: phantom flows around inverter start-up can otherwise be double-counted as both export and import within the same five-minute interval.