Is Solar Worth It in California? The Real Math for 2026

California has the highest residential electricity rates in the continental United States at $0.28/kWh (EIA, 2025). That single fact drives the entire solar calculation. High rates mean high savings per kilowatt-hour your panels produce. But the shift to NEM 3.0 in April 2023 changed the export math materially, and ignoring that change leads to wildly overoptimistic payback projections.

Here’s what the numbers actually look like in 2026.

What Californians pay for electricity

The statewide average residential rate is $0.28/kWh (EIA State Electricity Profiles, 2025). But averages hide a lot. PG&E customers on tiered plans can pay $0.30–$0.42/kWh in higher tiers. Southern California Edison runs $0.25–$0.40/kWh depending on time-of-use period. SDG&E customers face rates above $0.35/kWh during peak hours.

Most California utilities now default to time-of-use (TOU) rate plans. That matters for solar because your panels produce the most electricity in the middle of the day, which under current TOU schedules is often the cheapest period. Peak pricing (4–9 PM) hits after solar production drops off.

The average California household uses about 550 kWh per month. At $0.28/kWh, that’s roughly $1,848 per year in electricity costs.

California’s solar resource

California averages 1,825 peak sun hours per year (NREL PVWatts). That’s strong by any measure, but varies by region.

Southern California (Los Angeles, San Diego, Imperial Valley) gets the most sun, often exceeding 1,900 peak hours. The Central Valley (Fresno, Bakersfield) is similarly strong. The Bay Area and coastal regions see more fog and marine layer, dropping closer to 1,700 peak hours. Northern California mountains are lower still.

A typical 7 kW system in Southern California produces roughly 10,500 kWh per year. In San Francisco, that same system produces closer to 9,100 kWh.

Available incentives

Federal Investment Tax Credit (ITC): 30% of total system cost. On a $25,000 system, that’s $7,500 off your federal tax bill. This isn’t a deduction; it’s a dollar-for-dollar credit. You need sufficient tax liability to claim it.

State incentives: California has no statewide upfront solar incentive as of 2025 (DSIRE). The former California Solar Initiative rebate program is long closed.

Self-Generation Incentive Program (SGIP): This is a battery storage incentive, not a solar panel incentive. SGIP provides rebates for battery systems, with higher rebates in fire-threat districts and for low-income households. If you’re adding a battery (which NEM 3.0 makes much more attractive), SGIP can offset $200–$950/kWh of battery capacity depending on your eligibility tier.

Property tax exemption: California excludes solar energy systems from property tax assessment. Your home value goes up; your property tax stays the same.

Sales tax exemption: Solar equipment purchases are exempt from California state sales tax.

NEM 3.0: the big change

This is the most important section of this article. If you’re evaluating California solar in 2026, NEM 3.0 (technically “Net Billing”) defines your financial return.

Under the old NEM 2.0, your utility credited exported solar at the full retail rate. Send a kilowatt-hour to the grid at 2 PM, get $0.28–$0.35 credited against your evening usage. That math was extremely favorable.

NEM 3.0, effective April 2023, changed export credits to an “avoided cost” rate that averages roughly $0.05–$0.08/kWh, depending on time of day and month. That’s 75–80% less than the retail rate you’d save by using the electricity yourself.

What this means in practice: a kilowatt-hour you consume directly saves you $0.28+. A kilowatt-hour you export earns you $0.05–$0.08. The gap between self-consumption and export is now enormous.

The practical effect: NEM 3.0 makes batteries dramatically more valuable. Storing midday solar production and using it during evening peak hours (when you’d otherwise buy at $0.35–$0.50/kWh) can nearly double your effective savings compared to exporting. A solar-plus-battery system under NEM 3.0 can outperform a solar-only system under NEM 2.0, but the upfront cost is $8,000–$15,000 higher.

Realistic payback period

Let’s run the math on a typical California installation.

Assumptions: 7 kW system, $25,000 gross cost, $17,500 net after 30% ITC, 70% self-consumption rate (no battery), 30% exported at $0.07/kWh average, $0.28/kWh retail rate, 1,825 peak sun hours.

Simple payback: roughly 7.9 years on the net cost.

Add a battery and push self-consumption to 90%, and the payback shifts to roughly 8.5–9.5 years (higher upfront cost, but higher annual savings). Without a battery in a NEM 3.0 world, you’re leaving $600–$900/year on the table in low-value exports.

With electricity rate increases of 3–5% annually (California’s recent trend has been steeper), the payback tightens further. Year-10 savings will be substantially higher than year-1.

Financing options

Cash purchase: Best long-term ROI. No interest costs. Full ITC benefit in year one (if you have the tax liability).

Solar loan: Common at 4–7% APR over 10–25 years. Monthly payments often match or slightly exceed the electricity bill savings in the early years, then shift positive as rates rise. Make sure you compare the total interest paid against the total electricity savings. Some 25-year loans cost more in interest than the system saves.

HELOC: Lower rates than solar loans (typically 7–9% in California’s current rate environment), and the interest may be tax-deductible if used for home improvement. Shorter terms mean higher payments but less total interest.

Lease/PPA: You don’t own the system. A third party installs and owns the panels; you buy the electricity at a set rate (usually lower than the utility). No upfront cost, no ITC benefit (the leasing company claims it). Savings are real but smaller. The system doesn’t add to your home value in the same way.

The honest verdict

Solar makes strong financial sense for most California homeowners. The combination of high electricity rates, strong sun, property and sales tax exemptions, and the 30% federal credit creates a payback period under 10 years for a system that lasts 25–30.

But NEM 3.0 changed the math, and anyone who quotes you NEM 2.0 era payback numbers (5–6 years) for a new installation is either uninformed or dishonest. The realistic payback for solar-only under NEM 3.0 is 7–9 years. With a battery, it’s 8.5–10 years but with higher total lifetime savings.

Even in the weaker cases, California’s high rates often still push the math toward positive ROI over a 25-year panel lifespan. But the margin is thinner, and financing terms matter more.

FAQ

How much does solar cost in California in 2026?

A typical residential system (6–8 kW) costs $22,000–$30,000 before the 30% federal tax credit. After the credit, expect $15,400–$21,000 net. California’s costs run about 10–15% above the national average due to higher labor costs and permitting requirements. Prices vary significantly by installer and region.

Does California have a state solar tax credit?

No. California does not currently offer a state-level solar tax credit or upfront rebate (DSIRE, 2025). The primary financial incentives are the federal 30% ITC, property tax exemption, and sales tax exemption. The SGIP program provides rebates for battery storage, not solar panels directly.

Is solar still worth it after NEM 3.0?

Yes, but the math changed. Under NEM 3.0, exported solar earns $0.05–$0.08/kWh instead of the full retail rate. This makes batteries much more valuable, since storing and self-consuming your solar is worth 3–5x more than exporting it. Solar-only systems still pencil out with a 7–9 year payback in most of California, and solar-plus-battery systems maximize long-term savings.

How long do solar panels last in California?

Most panels carry a 25-year warranty and continue producing electricity for 30–35 years with gradual degradation (roughly 0.3–0.5% per year). After 25 years, a typical panel still produces 85–90% of its original output. The inverter typically needs replacement once during the system’s life, at a cost of $1,500–$3,000.

Should I add a battery with solar in California?

Under NEM 3.0, a battery makes the math significantly better for most households. Without a battery, you export midday solar at $0.05–$0.08/kWh. With a battery, you store that energy and use it during peak hours when you’d otherwise buy at $0.35–$0.50/kWh. The battery adds $8,000–$15,000 to system cost (before SGIP rebates), but increases annual savings by $600–$1,200 in most cases.