If you've shopped for solar in California recently, you've heard the term "NEM 3.0." It's the rule that decides how much you're paid for the energy your panels send back to the grid — and it's the single biggest reason batteries have gone from optional to standard on new SoCal installs.
What actually changed
Under the old rules (NEM 2.0), every kilowatt-hour your panels exported earned roughly the same credit as a kilowatt-hour you bought — close to full retail value. The Net Billing Tariff, often called NEM 3.0, replaced that with export credits based on the grid's "avoided cost." It applies to customers of California's big investor-owned utilities — Southern California Edison (SCE) and, for parts of Kern County, PG&E. (LADWP, as a municipal utility, runs its own separate net-metering program.) In practice, exports are now worth significantly less than the retail rate you pay at night. The exact value changes by hour and season, but the headline is simple: sending power to the grid mid-day is no longer the goldmine it used to be.
Why this makes the battery matter
Your panels produce the most at mid-day, when export credits are lowest. Your home uses the most in the evening, when grid rates are highest — on SCE's time-of-use plans, that's the 4–9 p.m. peak window. A battery bridges that gap: it stores your cheap mid-day solar and releases it during that expensive peak instead of letting you buy from the utility. In the high desert, where Lancaster and Palmdale homes run AC hard into the evening through the summer, that evening peak is also when usage is highest — so self-consumption is where the savings now live.
Does solar still pay off without a battery?
It can — especially if you use a lot of power during daylight hours (people who work from home, run pool pumps, or charge an EV during the day). But for most households, a solar-plus-storage system delivers a noticeably stronger return under NEM 3.0 than panels alone. The right answer depends on your usage pattern and rate plan, which is exactly what a site-specific design sorts out.
The hidden upside: outage protection
There's a bonus that has nothing to do with rates. A properly configured battery keeps your essentials — fridge, Wi-Fi, lights, medical equipment — running through a grid outage or a Public Safety Power Shutoff. For a lot of SoCal homeowners, that resilience is half the reason they add storage in the first place. We break down sizing in our battery guide.
What it means for your quote
Because export credits are lower, a good 2026 design is built around your evening usage, not just maximizing panel count. Be cautious of any quote that still assumes old-style net metering — the savings math is different now. An honest design models your actual rate plan and the NEM 3.0 export schedule so the numbers you're shown are the numbers you'll see.
The bottom line
NEM 3.0 didn't kill solar in California — it shifted the winning strategy from "export everything" to "store and self-consume." Pair the right system size with storage built around your evenings, and the economics still work well across Southern California. The only way to know your real numbers is a free, site-specific design. ACS has designed solar and battery systems across the Antelope Valley, Los Angeles, and Ventura counties since 1983 — request a free estimate to see what makes sense for your home and rate plan.