California NEM 3.0 (NBT)

The California NEM 3.0 (NBT) is a net metering tracked in the federal DSIRE database as one of California's solar policy levers. Eligibility is scoped to residential customers, with a stated benefit of Time-of-use export rates. The program does not carry a scheduled sunset in DSIRE, though appropriations and enabling legislation can still be revised year to year. Like every state-level incentive, it is designed to stack on top of the federal 30% Investment Tax Credit rather than replace it.

Layered onto California's underlying economics, this matters more than it might look in isolation. The state averages 5.8 kWh/m²/day of usable sunlight and residential rates of 30¢/kWh, producing an estimated 10,162 kWh/year and $3,049 in annual utility offset on a typical 6kW system costing $19,200. Without incentives that baseline already implies a 6.3-year simple payback — every dollar this net metering delivers compresses that payback further and improves 25-year net returns, currently modeled at roughly $57,025 before accounting for the California NEM 3.0 (NBT) itself.

This program is not the only option. California has 5 solar incentive programs indexed in DSIRE, including adjacent options like CA Active Solar Energy System Property Tax Exclusion, CA Green Tariff/Enhanced Community Renewables, Self-Generation Incentive Program (SGIP). The state's net metering policy is classified as partial, which governs how excess generation is credited and often determines whether a given program is worth claiming for a specific household. Before applying, verify current terms on the official program page, confirm your utility participates, and consult a qualified tax professional about how state credits interact with the federal ITC on your return.