If you’ve looked into solar for your Orange County home recently, you’ve probably heard the term “NEM 3.0” come up. It’s the biggest change to California solar economics in over a decade, and it’s the main reason battery storage has gone from a nice-to-have to close to a must-have for anyone going solar today.
What Actually Changed With NEM 3.0
In December 2022, the California Public Utilities Commission adopted a new set of rules for how utilities like SCE, PG&E, and SDG&E pay solar customers for the power they send back to the grid. The change, officially called the Net Billing Tariff but widely known as NEM 3.0, applies to any home that submitted its interconnection application on or after April 15, 2023. Homes that were already up and running before that date were grandfathered onto the old NEM 2.0 rules for 20 years.
The headline change is what SCE pays you for exported solar power. Under NEM 2.0, exported electricity was credited at close to the retail rate, often in the neighborhood of $0.25 to $0.30 per kWh. Under NEM 3.0, that credit is based on the “avoided cost” of that power to the grid, which typically works out closer to $0.05 to $0.08 per kWh depending on the time of day. That’s a drop of roughly 75% in what your excess solar is worth the moment it leaves your roof.
Why the Timing Mismatch Matters
Here’s the core problem NEM 3.0 creates: your solar panels produce the most power in the middle of the day, right when the grid needs it least and your export credit is worth the least. Meanwhile, most Southern California utilities now bill residential customers on time-of-use rate plans, where electricity gets significantly more expensive in the late afternoon and evening, exactly when the sun is going down and your panels are winding down for the day.
Without a battery, a solar-only system sends its cheapest, most abundant power to the grid for pennies, then buys it back at the most expensive rate of the day just a few hours later. It’s an awkward mismatch that stretches out payback periods, with some solar-only systems now taking 8 to 10 years to pay for themselves instead of the 5 to 7 years that was typical under the old rules.
How a Tesla Powerwall Closes the Gap
This is exactly the gap battery storage is built to close. Instead of exporting your midday solar production to the grid for a few cents a kilowatt-hour, a Tesla Powerwall stores it at your house. Then, once the sun goes down and your utility’s peak pricing kicks in, your home draws from the battery instead of buying expensive grid power. You’re using your own solar energy twice as effectively: once to power your home directly, and again a few hours later when the grid would otherwise cost the most.
The Bottom Line
If you’re comparing quotes for solar in Aliso Viejo or anywhere else in Orange County, ask whether the proposal includes storage. Under today’s rules, pairing Tier 1 solar panels with a Tesla Powerwall is usually what gets a system’s payback timeline back down to a reasonable range. Want to see what a solar plus storage bundle would look like for your home? Get a free estimate and we’ll walk you through the numbers.
Related reading: Learn more about solar battery backup, home solar installation, what solar costs in Orange County, and what to know before you get solar quotes. Have questions about your own project? Contact Energy-SBC for a free consultation.