NEM 3.0 Explained for LA Homeowners (and Why Batteries Changed the Math)

Last updated: September 2026

If you've researched solar in Los Angeles lately, you've run into some version of "NEM 3.0 killed solar." It didn't — but it did change how a solar system needs to be designed to make sense. And in LA specifically, there's a twist most articles skip: whether NEM 3.0 applies to you at all depends on which utility serves your home.

For project planning, start with the Los Angeles solar planning hub for panels, utility rules and roof coordination, and the Tesla Powerwall installer guide for battery sizing, backup loads and solar integration.

First: what NEM 3.0 actually is

"NEM 3.0" is the common name for California's Net Billing Tariff, which took effect for new solar customers of the state's CPUC-regulated utilities — in our area, that's Southern California Edison (SCE) — in April 2023.

Under the old net metering rules, every kilowatt-hour your panels exported to the grid earned roughly a kilowatt-hour's worth of credit against your bill. Under the Net Billing Tariff, exported power is credited at the utility's "avoided cost" — a rate that is much lower than what you pay for the power you import, and that varies by hour and season. Midday exports, when everyone's solar is producing at once, are worth the least.

The practical effect: a system designed the old way — sized to export heavily at midday — earns much less than it used to. A system designed for today's rules stores its surplus instead of exporting it.

The LA twist: LADWP is not on NEM 3.0

The Net Billing Tariff is a CPUC policy, and the CPUC regulates investor-owned utilities. LADWP is a municipal utility and sets its own solar compensation rules — as do Burbank Water and Power, Glendale Water and Power, Pasadena Water and Power, and Anaheim Public Utilities. Their programs have historically been more favorable to solar exports than the CPUC track, and they change on their own schedules.

So the first question in any LA solar conversation isn't "how many panels?" — it's "who's your utility?" A homeowner in Van Nuys (LADWP) and one in Torrance (SCE) can have identical roofs and completely different solar economics.

Why batteries changed the math for SCE homes

Under the Net Billing Tariff, the value of a solar kilowatt-hour depends on when it's used:

• Power you consume directly from your panels offsets the full retail rate you'd otherwise pay. That value didn't change.
• Power you export at midday earns the low avoided-cost rate. This is what got cut.
• Power you store and use in the evening — when time-of-use rates are at their highest — offsets the most expensive electricity of the day.

A battery converts your lowest-value production hours into your highest-value consumption hours. That's why system design flipped: instead of "how much can we export," the question is now "how much of your own production can you actually use?" Pairing solar with storage, and putting the home on the right time-of-use rate plan, is how the economics work under NEM 3.0 — and it's why most new SCE-territory systems we design include a battery from day one.

The battery also does something net metering never did: it keeps essential circuits running through outages and PSPS events. For many of our fire-zone and hillside customers, that's the primary reason for the project, with the rate arbitrage as the bonus.

What about incentives?

Battery storage may qualify for SGIP incentives in SCE territory, with larger tiers for households that are income-qualified, medically dependent on power, or in high-fire-threat areas — subject to program funding and eligibility at application time. The federal tax-credit landscape also changed with 2025 legislation. Current program status lives on our California & LA incentives tracker, which we re-verify quarterly; we confirm what may apply to a specific project at proposal time rather than promising outcomes. Home Upgrade Specialist is not a tax advisor — consult your tax professional on anything tax-related.

Common NEM 3.0 questions

I have solar already — do the new rules apply to me?

Existing SCE solar customers were enrolled under the rules in effect when their system was approved, and generally keep that treatment for a legacy period. Modifying or significantly expanding a system can affect that status — worth checking before you change anything.

Is solar still worth it in SCE territory?

It depends on your usage pattern, rate plan, roof, and whether storage is part of the design — which is exactly why we won't answer it generically. A system designed around self-consumption and evening offset behaves very differently from a 2020-style export system. The honest answer comes from your actual bills, not a rule of thumb.

Does NEM 3.0 affect my HOA's approval?

No — HOA review is governed by state law regardless of utility rules. If your association is slowing you down, see our guide to what California HOAs can and can't require for solar.

What if I'm on LADWP?

Different program, different math — often better for exports, but LADWP's programs and rates change year to year and are verified per project. The LADWP-vs-SCE differences are summarized on the incentives tracker.

Get the math done for your actual house

Utility territory, rate plan, usage pattern, roof condition, panel capacity, battery sizing — they all move the answer. The free Home Upgrade Blueprint Planner works through them in the right order for your specific property.

Build My Free Blueprint →

Home Upgrade Specialist, Inc. — licensed LA contractor for HVAC, solar, roofing, battery backup, Tesla Powerwall, and EV charging. CSLB #1031989, #1055444. Serving Los Angeles County and Orange County.