California NEM 3.0 Explained: Is Solar Still Worth It for New Customers in 2026?

In April 2023, California's Public Utilities Commission (CPUC) rolled out NEM 3.0 — the biggest overhaul to the state's solar billing rules in two decades. If you've gotten a solar quote recently and noticed the numbers looked different than your neighbor's from 2021, this is why.

The short answer: yes, solar is still worth it in California — but the math changed. A lot. And batteries became significantly more important.

Here's everything you need to know.

What Is Net Energy Metering (NEM)?

Net Energy Metering lets solar homeowners send excess electricity to the grid and receive a credit on their utility bill. Under the original NEM 1.0 and NEM 2.0 rules, those credits were valued close to the retail rate — meaning if you sold a kilowatt-hour to PG&E at 2pm, you got roughly the same credit as if you had consumed it yourself.

That made solar a slam-dunk financial decision in California for years.

What Changed Under NEM 3.0?

NEM 3.0 (also called the Avoided Cost Calculator or ACC-based tariff) drastically reduced the value of daytime solar exports.

The key changes:

• Export credits dropped by roughly 75% during peak solar hours (10am–3pm). Instead of earning ~30 cents/kWh during the day, homeowners now earn 5–8 cents/kWh when grid supply is high from solar.
• Evening export credits increased, reflecting real grid conditions — power is actually scarce and valuable from 4–9pm.
• Monthly fees stayed or increased, meaning break-even takes longer on a solar-only system.

For a typical Southern California homeowner, this moved the payback period for a solar-only system from 6–8 years to 9–14 years.

Who Is (and Isn't) Affected?

NEM 3.0 affects you if:

• You applied for NEM interconnection after April 13, 2023
• You're installing solar for the first time in 2026

NEM 3.0 does NOT affect you if:

• You were already on NEM 1.0 or NEM 2.0 — you're grandfathered in for 20 years from your original interconnection date
• You're in a utility district not under CPUC jurisdiction (some rural electric co-ops)

The Battery-and-Solar Math Under NEM 3.0

Here's where it gets interesting. NEM 3.0 was deliberately designed to incentivize home battery storage. The evening export window (4–9pm) pays significantly higher credits — sometimes 2–3x higher than daytime rates.

The strategy that makes NEM 3.0 work financially:

1. Your solar panels charge your battery during the day (instead of dumping cheap power to the grid)
2. Your battery discharges in the evening when export credits are highest (or you self-consume instead of buying expensive TOU power)
3. Net result: you capture full value from every kWh your panels produce

A properly sized solar + battery system under NEM 3.0 can match or beat the economics of a solar-only system under NEM 2.0.

Example: 8kW Solar + 13.5kWh Battery in San Jose

Scenario	Annual Bill Savings	Payback Period
NEM 2.0 solar only (pre-2023)	~$1,800/yr	7 years
NEM 3.0 solar only (2026)	~$900/yr	12–14 years
NEM 3.0 solar + Powerwall 3 (2026)	~$1,600/yr	8–10 years

Numbers vary significantly by utility, system size, and household consumption.

Which Utilities Are Under NEM 3.0?

NEM 3.0 applies to California's three investor-owned utilities (IOUs):

• PG&E (Pacific Gas & Electric) — Northern/Central California
• SCE (Southern California Edison) — Los Angeles, Orange County, Inland Empire
• SDG&E (San Diego Gas & Electric) — San Diego County

Los Angeles Department of Water and Power (LADWP), Sacramento Municipal Utility District (SMUD), and most other municipal utilities have their own separate programs and are not subject to NEM 3.0. If you're in Sacramento, SMUD's battery incentive is among the best in the country.

Does the Federal Tax Credit Still Apply?

Yes. The Inflation Reduction Act's 30% federal Investment Tax Credit (ITC) applies to both solar panels and battery storage installed in 2026. This significantly offsets the longer payback period.

For a $25,000 solar + battery system:

• 30% ITC = $7,500 back at tax time
• Effective system cost = $17,500
• At $1,600/year savings → ~11-year payback

California SGIP: The Battery-Specific Rebate

California's Self-Generation Incentive Program (SGIP) provides additional rebates specifically for battery storage — up to $1,000/kWh in equity-focused incentive tiers for qualifying households.

Combining SGIP + the 30% ITC dramatically improves the NEM 3.0 economics:

• $10,000 battery cost
• Minus $3,000 (30% ITC)
• Minus $1,000–$3,000 (SGIP, depending on tier)
• Net battery cost: $4,000–$6,000

What About Virtual Power Plants (VPPs)?

Under NEM 3.0, several utilities and battery manufacturers are launching Virtual Power Plant programs that pay homeowners additional revenue for allowing grid operators to draw from their batteries during emergencies.

• PG&E's Home Battery Program: pays ~$2/kWh for emergency dispatches
• Powerwall Virtual Power Plant: Tesla coordinates Powerwall owners in SCE territory
• Enphase IQ System Controller: compatible with multiple VPP programs

VPP revenue can add $200–$500/year on top of NEM bill savings, further improving payback.

The Bottom Line: Should You Go Solar in 2026 Under NEM 3.0?

Yes — with a battery.

Solar-only under NEM 3.0 is a worse deal than it was under NEM 2.0. The payback period is longer and the ongoing savings are lower if you're just exporting daytime power at pennies on the dollar.

But solar + battery under NEM 3.0 is competitive — and in some cases better — thanks to:

• Lower battery costs (down 40% since 2020)
• The 30% federal ITC covering panels AND batteries
• SGIP rebates in California specifically
• High evening TOU rates that make battery discharge economically powerful
• VPP revenue opportunities

The homeowners who get the worst deal under NEM 3.0 are those who install large solar systems without storage, hoping to run the meter backward all day. The homeowners who do best are those who right-size their solar and pair it with a battery to capture their own power in the evening.