California Solar Overview
California's NEM 3.0 changed everything. I have had to completely rethink the advice I give to CA homeowners. Pre-April 2023, solar-only systems were a slam dunk. Now? Batteries are not optional—they are essential if you want to maximize your investment. The economics still work, but you need to be strategic. I have spent a lot of time studying these new rates, and the key is self-consumption, not exports.
California has more residential solar than any other state—and for good reason. Despite recent policy changes, the combination of high electricity rates, abundant sunshine, and state incentives makes solar a strong investment for most California homeowners.
Payback Period: 6-9 years
Net Metering: NEM 3.0 (reduced export rates) — CPUC Decision 22-12-056
Key Incentive: SGIP battery rebate ($150-$200/kWh) — CPUC SGIP Program
NEM 3.0 Explained
California's Net Energy Metering 3.0 (NEM 3.0) took effect April 15, 2023, and significantly changed solar economics. Here's what you need to know:
What Changed
| Factor | NEM 2.0 (Old) | NEM 3.0 (Current) |
|---|---|---|
| Export Credit | ~$0.30/kWh (full retail) | ~$0.05-$0.08/kWh (varies by time) |
| Credit Reduction | None | 75-80% lower than retail |
| Best Strategy | Maximize exports | Maximize self-consumption |
| Battery Value | Optional | Highly recommended |
How NEM 3.0 Works
Under NEM 3.0, the credit you receive for exported solar depends on the time of day and the "avoided cost" to the utility. Exports during peak evening hours (4-9 PM) are worth more than midday exports when solar is abundant.
- Midday exports: ~$0.04-$0.06/kWh
- Peak exports (4-9 PM): ~$0.08-$0.12/kWh
- Weekend/off-peak: ~$0.03-$0.05/kWh
California Solar Costs
California solar costs are slightly above the national average due to higher labor rates and permitting requirements, but the payback is still excellent thanks to sky-high electricity rates.
| System Size | Gross Cost | With Battery |
|---|---|---|
| 5 kW | $14,000-$16,000 | $26,000-$30,000 |
| 7 kW | $19,600-$22,400 | $31,600-$36,400 |
| 10 kW | $28,000-$32,000 | $40,000-$46,000 |
Battery adds approximately $12,000-$14,000 for one Tesla Powerwall or equivalent.
California Solar Incentives
Federal Tax Credit
- Cash/Loan Purchase: No federal credit (25D expired Dec 2025)
- PPA/Lease: 30% credit claimed by solar company (savings passed to you)
State Incentives
- SGIP Battery Rebate: $150-$200/kWh (see below)
- Property Tax Exclusion: Solar doesn't increase property taxes
- Sales Tax Exemption: No sales tax on solar equipment
- CARE/FERA Discounts: Low-income programs with higher incentives
SGIP Battery Rebate
The Self-Generation Incentive Program (SGIP) provides rebates for solar batteries. This is one of the best battery incentives in the country.
SGIP Rebate Amounts
| Category | Rebate per kWh | Tesla Powerwall (13.5 kWh) |
|---|---|---|
| Standard Residential | $150/kWh | ~$2,000 |
| Equity (low-income) | $850/kWh | ~$11,500 |
| Equity Resiliency (high fire risk + low-income) | $1,000/kWh | ~$13,500 |
SGIP funding comes in waves and can run out quickly. Check with your installer about current availability.
Is Solar Worth It in California?
Yes, but the strategy has changed. Here's the honest assessment:
Solar is Still Worth It Because:
- California electricity rates are among the highest in the nation ($0.35-$0.55/kWh) — EIA, 2025
- Rates are increasing 6-8% per year (locked in savings) — CPUC rate case filings
- Self-consumption still saves full retail value
- Battery + solar maximizes value under NEM 3.0
- Property tax exemption protects home value
But You Should Know:
- NEM 3.0 reduced ROI compared to NEM 2.0 (was 5-6 years, now 7-9 years)
- Battery is almost essential to maximize value
- System design matters more—size for self-consumption, not export
- PPA/Lease may be more attractive now (includes 30% federal credit)
Utility-Specific Information
PG&E (Pacific Gas & Electric)
- Covers Northern and Central California
- TOU rates with expensive peak (4-9 PM)
- NEM 3.0 applies
- Known for slow interconnection (plan for 4-6 week wait)
SCE (Southern California Edison)
- Covers most of Southern California
- Similar TOU structure to PG&E
- NEM 3.0 applies
- Generally faster interconnection than PG&E
SDG&E (San Diego Gas & Electric)
- Covers San Diego area
- Highest rates in California
- NEM 3.0 applies
- Solar ROI often fastest in SDG&E territory
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