US residential solar · 2026 data

Solar Panels in California

Q: "How much do solar panels cost in California after the federal tax credit?"

"The average California residential solar system costs $19,950–$28,800 before incentives in 2026. After applying the 30% federal Investment Tax Credit, the effective out-of-pocket cost drops to roughly $14,000–$20,200 for most homeowners. A 7 kW system at $3 per watt grosses $21,000 and nets to $14,700 after the ITC. Local SGIP battery rebates can reduce total costs further, depending on eligibility."

Q: "What is NEM 3.0 and how does it affect solar savings in California?"

"NEM 3.0, effective April 2023, reduced the credit rate for solar exported to the grid from near-retail (25–32 cents/kWh) to an average of 5–9 cents/kWh. Homeowners who self-consume most of their solar are less affected. NREL estimates NEM 3.0 reduces 25-year savings by roughly 25–30% for export-heavy systems, though pairing solar with a battery largely offsets this by maximizing on-site consumption during high-rate evening hours."

Q: "How long is the solar payback period in California in 2026?"

"A solar-only system under NEM 3.0 typically pays back in 10–13 years. With a battery and the SGIP rebate, that drops to 7–10 years for most California homes. The exact timeline depends on your utility, rate plan, and consumption level. Higher utility rates — PG\u0026E averaged over 32 cents/kWh in 2025 — shorten the payback period, while financing costs lengthen it."

Q: "Does California still have a solar rebate in 2026?"

"California has no statewide solar panel rebate in 2026. However, the federal 30% ITC applies to all new systems, the SGIP provides battery storage rebates of $150–$1,000 per kWh, solar hardware is exempt from state sales tax, and the property tax exclusion prevents your assessment from rising due to added solar value through January 2027. Some municipal utilities and community choice aggregators offer additional local incentives."

Q: "Should I lease or buy solar panels in California?"

"For most California homeowners with a federal tax liability of $7,500 or more, buying — outright or with a solar loan — produces a better 25-year outcome than leasing or a PPA. Ownership gives you the 30% ITC directly, full home value appreciation (roughly $4/watt per LBNL research), and no lease complications at resale. Leasing suits homeowners with low tax liability or limited upfront cash who want immediate bill savings. *Data sources: U.S. Energy Information Administration (EIA) residential electricity rates 2025; National Renewable Energy Laboratory (NREL) U.S. Solar Photovoltaic System and Energy Storage Cost Benchmarks Q1 2026; Solar Energy Industries Association (SEIA) California state solar market report 2025; IRS Notice 2023-29 (ITC and battery storage eligibility); California Public Utilities Commission NEM 3.0 Decision D.22-12-056; California SGIP program guidelines 2026; Lawrence Berkeley National Laboratory \"Selling Into the Sun: Price Premium Analysis of a Multi-State Dataset of Solar Homes.\"*"

SAVE

$0+

Over 25 Years

$14,700 Cost after ITC

6.6 yrs Payback

7.0 kW Typical system

Most homeowners need:

16–20 panels typical
7.0 kW average system
$14,700 after tax credits
6.6 year payback

✓ Updated monthly ✓ NREL data ✓ Reviewed by solar experts ✓ IRS tax credit included

Updated April 21, 2026 · 10 min read ·By Mark Sullivan ·Reviewed by Green Energy Calculators Editorial Team

Calculate My Savings View California Data

Without solar vs with solar

25-year cost comparison for a $300/month US electric bill.

Without solar

25-year utility cost

$93,600

Rates rise ~3% per year (EIA avg.)

With solar

Net system cost

$14,700

After 30% federal ITC

Your savings

Difference

+$78,900

Estimated lifetime advantage

Author Mark Sullivan

Reviewed by Green Energy Calculators Editorial Team

Last updated Apr 21, 2026

Sizing formula kW = Annual kWh ÷ (Peak Sun Hours × 365 × 0.82)

California homeowners installed more rooftop solar last year than any other state, and the average residential system saves between $1,200 and $1,800 per year on electricity, according to the Solar Energy Industries Association (SEIA). With utility rates among the highest in the continental US — Pacific Gas & Electric’s average residential rate crossed 32 cents per kilowatt-hour in 2025 — going solar is one of the few financial moves that pays you back reliably over 25 years. But the landscape has shifted. The rollout of NEM 3.0 changed the economics of solar without batteries, and new federal and state programs have reshaped what 2026 incentives look like in practice.

If you’ve been putting off the decision because the numbers felt complicated, this guide cuts through the noise. It covers what a typical California system actually costs after incentives, how long it takes to pay back, which 2026 programs you can still claim, and what the difference between leasing and buying means for your long-term return. Every figure here is based on current data from the EIA, NREL, and SEIA — not installer marketing materials.

California’s solar payback period lengthened when NEM 3.0 took effect in April 2023, reducing the credit rate for excess solar exported to the grid. Adding battery storage largely restores the original economics. Whether that trade-off makes sense for your home depends on your utility, usage pattern, and roof — and the sections below will help you work through each piece.

What Does a Solar System Cost in California in 2026?

The median cost of a residential solar installation in California in 2026 sits at roughly $2.85 to $3.20 per watt before incentives, according to NREL’s Q1 2026 cost benchmark data. For the average California home, which needs around 7 to 9 kilowatts of solar capacity to offset most of its electricity use, that puts the gross system price between $19,950 and $28,800.

Those numbers look large until you factor in the federal Investment Tax Credit (ITC), which remains at 30% through 2032 under the Inflation Reduction Act. A $25,000 system generates a $7,500 tax credit that directly reduces what you owe the IRS — not a deduction, but a dollar-for-dollar credit. That brings the effective out-of-pocket cost to around $17,500 for a mid-range installation. Use the solar tax credit calculator to see exactly what your credit will be based on your system size and federal tax liability.

Beyond the federal credit, California does not currently offer a statewide solar rebate for most homeowners (the CSI program ended years ago), but several utilities and the Self-Generation Incentive Program (SGIP) do provide battery storage rebates that indirectly improve the solar economics. Installation costs also vary significantly by region — systems in the Bay Area typically run 8–12% higher than equivalent systems in the Central Valley or Inland Empire, reflecting local labor and permitting costs.

A few cost factors that often surprise first-time buyers: roof condition and pitch, electrical panel upgrade requirements (older 100-amp panels frequently need upgrading to 200-amp, adding $1,500–$3,000), and the type of inverter used. String inverters are cheapest; microinverters cost more upfront but typically improve output on partially shaded roofs. Before collecting quotes, estimate your capacity target using your monthly usage and roof orientation to arrive at a realistic system size.

Bar chart showing California solar system costs before and after federal tax credit for 5 kW, 7 kW, and 9 kW systems in 2026 — **California Solar System Cost Before and After the 30% Federal Tax Credit (2026)** A 7 kW system priced at $3 per watt costs $21,000 gross and $14,700 net after the ITC. Source: NREL Q1 2026 cost benchmarks.

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How California’s NEM 3.0 Changes Your Solar Savings

Net metering is the mechanism that credits you for surplus solar electricity sent back to the grid. Under the original NEM 2.0 rules — which still apply to systems installed before April 15, 2023 — homeowners received near-retail-rate credits, typically 25–32 cents per kilowatt-hour, for every unit exported. NEM 3.0 cut those export rates to an average of roughly 5–9 cents per kilowatt-hour, depending on the time of day and your utility (PG&E, SCE, or SDG&E). For a full cost breakdown by state and system size, see our guide to How Much Do Solar Panels Cost in 2026? Complete US.

That change has a significant impact on households that export a lot of power. Retirees at home all day who self-consume most of their production will notice less difference than a two-income family away from home during peak solar hours. NREL analysis suggests the average California solar-only system under NEM 3.0 sees its 25-year savings reduced by approximately 25–30% compared to NEM 2.0 economics. For more on this topic, see our guide to Solar Panels in Texas.

The reason installers now pair nearly every new California system with battery storage is straightforward: batteries let you shift self-consumption. Instead of exporting cheap midday solar back to the grid, a battery stores it and you discharge it in the evening when time-of-use rates are highest — often 45–55 cents per kilowatt-hour under PG&E’s E-TOU-C rate plan. Used this way, a 10 kWh battery can be worth an additional $400–$700 per year in avoided utility costs. Battery adoption in California nearly doubled between 2023 and 2025, a direct response to NEM 3.0’s reduced export rates.

Understanding your specific export profile matters before sizing a battery. A household that consumes 80% of its solar on-site gains relatively little from adding storage, while one that exports 50% of production during midday will see much larger financial gains. Modeling this with your actual utility bills is the most reliable way to size a battery correctly and avoid overspending on capacity you won’t fully use. The solar net metering calculator lets you model your export profile under NEM 3.0 rates for your specific utility so you can quantify the battery benefit before committing to the hardware.

Solar vs utility company · 25-year comparison

Total cost of staying on the grid vs owning solar for a $300/month bill (national average assumptions).

Total utility payments

$93,600

Total solar cost (after ITC)

$14,700

Net savings

+$78,900

Avg. monthly difference

+$181/mo

See my savings →

2026 Solar Incentives in California: Federal, State, and Utility Programs

The 30% federal Investment Tax Credit is the most valuable incentive available to California homeowners in 2026, and it applies to both the solar panels and any battery storage installed at the same time. The IRS requires that the battery be charged primarily from solar (not the grid) to qualify — a condition easily met with a properly configured system. Batteries added after the fact may also qualify if they meet the same charging requirement, per IRS Notice 2023-29.

The California SGIP battery rebate remains active in 2026, though funding levels fluctuate between reservation windows. The base residential rebate is $150 per kilowatt-hour of storage capacity for standard applicants, rising to $1,000 per kilowatt-hour for households in high fire-risk areas or those that qualify as equity customers (income-qualified). A 10 kWh battery would generate a base rebate of $1,500 — and up to $10,000 for equity-qualified customers. Applications are processed through your utility’s SGIP program administrator.

California also exempts solar equipment from state sales tax (saving roughly 7.25–10.25% on hardware costs depending on county) and excludes added home value from property tax assessment. That property tax exclusion matters: a solar system that adds $20,000 to your home’s assessed value would otherwise cost $200–$250 per year in additional taxes. The exclusion runs through January 1, 2027, and is expected to be renewed, though it requires legislative action to extend.

For homeowners interested in combining solar with an electric vehicle, the economics improve further. Charging an EV overnight from a solar-charged battery effectively reduces per-mile fuel cost to near zero during high-rate evening hours, stacking vehicle savings on top of the electricity bill reduction. Comparing California’s incentive stack to states like Arizona — which lacks California’s SGIP battery rebate — illustrates how much state-level programs add to overall return on investment.

Solar Payback Period and Long-Term ROI for California Homeowners

The payback period — the point at which cumulative energy savings equal your net system cost — is the number most homeowners focus on first. Under current conditions in California, a solar-only system installed under NEM 3.0 typically breaks even in 10–13 years. Add a battery and apply the SGIP rebate, and that payback period falls to roughly 7–10 years in most scenarios, because of the higher value of self-consumed power and the rebate reducing battery upfront cost.

That math assumes PG&E, SCE, or SDG&E rates continue to rise at their historical average of about 4–5% annually — a conservative assumption given California’s ongoing grid investment. SEIA projects that a well-sited California system will generate cumulative net savings of $35,000–$60,000 over 25 years depending on system size, utility, and whether storage is included. On a $17,500 net investment after the federal tax credit, that is a return profile most long-term investors would find compelling.

One factor homeowners frequently underestimate is the resale value effect. A Lawrence Berkeley National Laboratory study found that California buyers paid a premium of approximately $4 per watt for homes with owned solar systems — meaning a 7 kW system adds roughly $28,000 to sale price. That premium effectively moves your financial breakeven earlier, because it represents equity you capture even if you sell before the system pays back through energy savings alone.

Homeowners in comparable high-rate states like Massachusetts and Connecticut often see similar payback timelines, which puts California’s returns in useful national context. To model your specific numbers, the solar ROI calculator lets you input system size, net cost, utility rates, and expected rate escalation to generate a full 25-year financial picture with precise breakeven projections.

Should You Buy, Lease, or Sign a Solar PPA in California?

The ownership structure matters enormously for California homeowners because it determines who captures the federal tax credit, who benefits from home value appreciation, and how a future home sale is handled.

Buying outright or with a solar loan gives you the 30% federal ITC directly, maximum long-term savings, and the full property value increase at resale. The downside is higher upfront cost and responsibility for maintenance — though most reputable installers warranty equipment for 10–25 years and system production for 25 years. For the majority of homeowners with a federal tax liability above $7,500, ownership produces the strongest 25-year financial outcome.

A solar lease means a third party owns the panels. You pay a fixed monthly rate — typically lower than your current utility bill — but you do not receive the federal tax credit (the leasing company does). Leases run 20–25 years and can complicate home sales: the new buyer must qualify to assume the lease, which some decline. Lease escalator clauses — where your monthly payment rises 2–3% annually — can erode the financial advantage over time, sometimes significantly.

A power purchase agreement (PPA) is structurally similar to a lease: a company installs panels for free, and you buy the electricity they produce at a set rate, typically below current retail. Again, the ITC goes to the installer. PPAs make the most sense for homeowners who want immediate bill reduction with no upfront cost and plan to stay in the home long-term, though the same home-sale complications apply. In most California scenarios, ownership beats leasing or a PPA by $15,000–$25,000 over 25 years. States like Texas and Florida show similar ownership advantages, though without California’s SGIP rebate layer improving the margin further.

Before signing any agreement, compare the ownership and lease options with your actual quoted figures. The numbers vary considerably by installer, system size, and financing rate — and the right structure for a homeowner with a large federal tax liability may differ entirely from the right structure for one with low taxable income. Running both scenarios with your real costs and a realistic rate escalation assumption is the most important step you can take before committing.

Frequently asked questions

Direct answers for US homeowners in California.

How much do solar panels cost in California after the federal tax credit?

The average California residential solar system costs $19,950–$28,800 before incentives in 2026. After applying the 30% federal Investment Tax Credit, the effective out-of-pocket cost drops to roughly $14,000–$20,200 for most homeowners. A 7 kW system at $3 per watt grosses $21,000 and nets to $14,700 after the ITC. Local SGIP battery rebates can reduce total costs further, depending on eligibility.

What is NEM 3.0 and how does it affect solar savings in California?

How long is the solar payback period in California in 2026?

Does California still have a solar rebate in 2026?

Should I lease or buy solar panels in California?

$214/month electric bill by state

System size and payback vary by electricity rate and sun hours — see your state.

CA California $214/mo · 29.4¢/kWh TX Texas $214/mo · 13.8¢/kWh FL Florida $214/mo · 13.5¢/kWh AZ Arizona $214/mo · 13.2¢/kWh NC North Carolina $214/mo · 12.8¢/kWh NY New York $214/mo · 22.4¢/kWh MA Massachusetts $214/mo · 24.5¢/kWh CO Colorado $214/mo · 14.2¢/kWh

Compare all 50 states for $214/mo →

Popular state solar guides

Electricity rates and incentives vary — see data for your state.

CA California 29.4¢/kWh · 5.8h sun TX Texas 13.8¢/kWh · 5.6h sun FL Florida 13.5¢/kWh · 5.7h sun AZ Arizona 13.2¢/kWh · 6.5h sun NC North Carolina 12.8¢/kWh · 5.2h sun NY New York 22.4¢/kWh · 4.3h sun MA Massachusetts 24.5¢/kWh · 4.2h sun CO Colorado 14.2¢/kWh · 5.5h sun

View all 50 states →

Popular utility companies

Solar rules and net metering vary by utility — not just by state.

PG&E California Duke Energy NC · FL · Midwest Florida Power & Light Florida Oncor Texas APS Arizona Georgia Power Georgia

Methodology & data sources

Calculation method: System size uses NREL PVWatts derate factor (0.82). Costs based on SEIA 2026 installed cost ($2.75–$3.20/W). Payback uses net cost after 30% federal ITC (IRC Section 25D). Savings assume full-retail net metering unless noted.

Official sources: EIA state electricity rates · NREL PVWatts · Energy.gov ITC guide · DSIRE incentives · SEIA market data · IRS Publication 5695.

All figures are estimates for educational purposes — not tax, legal, or investment advice. Consult a licensed installer and CPA for your situation.