Net Metering in California: How You Get Credit for Extra Solar Power
California's net metering rules (NEM 3.0) changed in 2023. Here's what new solar buyers need to understand about selling power back to the grid.
Net Metering in California (NEM 3.0)
Net metering is the billing mechanism that credits you for solar electricity you send back to the grid. California updated its rules in April 2023 with NEM 3.0 — and the changes significantly affect how quickly new solar systems pay off.
How Net Metering Works
When your solar panels produce more electricity than your home uses, the excess flows to the grid. Your utility tracks this and provides a bill credit. When you use grid power at night, those credits offset what you owe.
What Changed with NEM 3.0
Under the old NEM 2.0 rules, homeowners were credited at near-retail electricity rates (~$0.25–0.30/kWh). Under NEM 3.0:
- Export credits are now based on the Avoided Cost Calculator rate
- Credits are typically $0.04–0.08/kWh — much lower than before
- This extends the payback period for solar-only systems by 2–4 years
Why Battery Storage Became Essential
The best response to NEM 3.0 is to pair solar with a battery like the Tesla Powerwall or Enphase IQ Battery. Instead of exporting cheap power to the grid, you store it and use it at night — avoiding the higher evening rates entirely.
Time-of-Use (TOU) Rates
NEM 3.0 works alongside TOU pricing. Electricity is most expensive from 4–9 PM (peak hours). A properly programmed battery system charges during the day and discharges during peak hours — maximizing your savings.
How to Maximize NEM 3.0 Value
- Add battery storage to your system
- Shift discretionary loads (EV charging, laundry, dishwasher) to solar production hours
- Use a smart energy management system to automate these shifts
NEM 3.0 didn't kill solar economics in California — it just changed the optimal system design. Battery + solar remains one of the best financial decisions a California homeowner can make.
