California remains the #1 solar state in the U.S. – but with a major policy change coming January 1, 2027, the cost and savings picture looks different than it did even a year ago. Here is everything you need to know about going solar in California in 2026, including a critical deadline every homeowner should know about.
Quick Answer: California Solar Costs in 2026
| System size | Before incentives | After 30% federal credit | After CA property tax exclusion (2026 only) |
|---|---|---|---|
| 6 kW (typical CA home) | ~$18,000 | ~$12,600 | ~$12,600 + tax savings |
| 8 kW | ~$24,000 | ~$16,800 | ~$16,800 + tax savings |
| 10 kW | ~$30,000 | ~$21,000 | ~$21,000 + tax savings |
California’s average cost per watt is around $2.90 to $3.20 installed, slightly below the national average due to high installer competition.
The 2026 Deadline You Cannot Miss
California’s solar property tax exclusion expires January 1, 2027. Under this exclusion, adding solar panels to your home does NOT trigger a property tax reassessment. On a $20,000 solar system with California’s median property tax rate (~1.1%), this saves you roughly $220/year – every year you own the home. Once the exclusion expires, new solar installations could trigger reassessment.
To qualify, your system needs to be installed and permitted before January 1, 2027. Given the 2-4 month installation timeline, that means starting the process no later than August-September 2026.
California Solar Incentives in 2026
- Federal 30% tax credit – available to all California homeowners. On a $24,000 system, that’s $7,200 back on your taxes.
- SGIP (Self-Generation Incentive Program) – rebates for battery storage, up to $1,000 per kWh for income-qualified households.
- Property tax exclusion – through December 31, 2026 (see above).
- NEM 3.0 (net metering) – California changed its net metering rules in 2023. Under NEM 3.0, export credits are lower, but pairing solar with a battery is more attractive than ever.
NEM 3.0: How It Changes Your Solar Math
Under NEM 3.0, the export credits you receive for excess solar you send to the grid are lower than under the old NEM 2.0 rules. This means:
- A correctly sized system that covers most of your usage still pays off well
- Oversizing your system makes less sense than it used to
- Adding a battery (like a Tesla Powerwall or Enphase IQ) lets you store excess power instead of exporting it at low rates
Most California installers now default to a solar + storage recommendation. The SGIP rebate helps offset the battery cost.
Average Payback Period in California
With electricity rates among the highest in the country (PG&E, SCE, and SDG&E customers often pay $0.28 to $0.45/kWh), California solar has one of the best payback periods nationally: typically 6 to 9 years after incentives. Over 25 years, the average California homeowner saves $30,000 to $60,000.
Top California Solar Installers
California has hundreds of licensed solar installers. When comparing quotes, look for:
- CSLB contractor license (required by law)
- NABCEP-certified installation crew
- Equipment warranties of 25+ years on panels
- Experience with NEM 3.0 system design and battery integration
Related: California Solar Incentives 2026 | Best Time to Go Solar | Is Solar + Battery Worth It?