California's Net Billing Tariff, in effect for new solar since April 2023. It credits exported power at avoided-cost rates (~4–8 cents/kWh) instead of the old near-retail rate — about 75% lower — which makes self-consumption and batteries much more valuable.

Do I need a battery for solar in California?

Not required, but strongly recommended under NEM 3.0. Because exports are credited so low, storing your own power for night and peak hours captures far more value than selling it back.

Solar Panels in California (2026 Guide)

Q: How much do solar panels cost in California in 2026?

About $2.80–$3.40 per watt installed — roughly $17,000–$20,000 for a 6 kW system and $28,000–$34,000 for a 10 kW system, before incentives. Most homeowners add a battery, which raises the total.

Q: Is solar worth it in California?

For most homeowners, yes — the highest electricity rates in the country make solar pay even under NEM 3.0. Solar-only payback can be ~4–5 years; solar plus battery ~8–9 years, with more long-term value and backup power.

California is still one of the strongest solar states in the country — it has the highest electricity rates in the U.S., which means big savings. But the rules changed: under NEM 3.0, the credit you get for exporting power dropped sharply, so how you design your system now decides whether you save a lot or a little. The short version: solar is very much worth it in California, but in 2026 it usually means solar plus a battery.

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How Much Do Solar Panels Cost in California?

California prices run a bit above the national average, roughly $2.80–$3.40 per watt before incentives:

6 kW system: ~$17,000–$20,000
8 kW system: ~$22,000–$27,000
10 kW system: ~$28,000–$34,000

Most California homeowners now add a battery (commonly $10,000–$16,000+ installed), which raises upfront cost but is often what makes the savings work under NEM 3.0. See our 2026 cost breakdown and solar + battery guide.

NEM 3.0 — The Most Important Thing to Understand

In April 2023, California switched new solar customers to NEM 3.0 (the Net Billing Tariff). The credit for power you export to the grid fell from the old near-retail rate (~30¢/kWh) to avoided-cost rates of roughly 4–8¢/kWh — a drop of about 75%. Those rates change by hour, day, and month (lowest midday, highest on summer evenings). In practice, exporting power is now worth far less than using it yourself, so the winning strategy is self-consumption plus a battery to store excess for night and peak hours. This is why solar + battery is the standard recommendation in California in 2026.

California Solar Incentives in 2026

Highest electricity rates in the country (the real "incentive")

California's average residential rate is about 30–32¢/kWh — among the highest in the U.S. Every kilowatt-hour your solar offsets saves you a lot.

Property tax exclusion — but it's sunsetting

California excludes the added value of a solar system from property tax. Important: this exclusion is currently scheduled to sunset January 1, 2027 (extension legislation has been moving but isn't guaranteed). Confirm current status before you buy.

SGIP battery rebate — currently closed

The Self-Generation Incentive Program (SGIP) historically offered strong battery rebates, but as of 2026 the main ratepayer-funded budgets are closed to new applications. Some income-qualified or resiliency pathways may have limited funds — verify rather than assume.

No state tax credit — and no federal credit in 2026

California has no state solar income tax credit, and the 30% federal residential credit expired December 31, 2025. The remaining federal benefit flows through leases and PPAs (installer claims the commercial 48E credit through 2027). See our 2026 incentives guide.

Is Solar Worth It in California?

Yes — for most homeowners, because the state's sky-high rates do the heavy lifting. Payback depends on design: solar-only (cash) can be roughly 4–5 years if you self-consume most production; solar + battery (cash) typically 8–9 years, but captures far more value under NEM 3.0 and adds backup power. Your utility (PG&E, SCE, SDG&E) and usage change the math — a custom quote is the only way to see your real numbers. See also our national is solar worth it guide.

Frequently Asked Questions

How much do solar panels cost in California in 2026?
About $2.80–$3.40 per watt — ~$17,000–$20,000 for 6 kW and $28,000–$34,000 for 10 kW, before incentives. Most add a battery.

What is NEM 3.0?
The Net Billing Tariff (since April 2023): exports credited at ~4–8¢/kWh, about 75% below the old retail rate.

Do I need a battery in California?
Not required, but strongly recommended under NEM 3.0.

Does California have a solar tax credit?
No state credit; the 30% federal credit expired December 31, 2025. There is a property tax exclusion (sunsetting Jan 1, 2027).

Is solar worth it in California?
For most homeowners, yes — the highest rates in the country make it pay even under NEM 3.0.

Solar Energy Nerds provides general information, not tax or financial advice. Incentives and costs vary by state, utility, and household — verify current figures for your address before making a decision.