California solar at a glance
Solar in California pays back in 5 to 8 years on a cash purchase and clears $40,000 to $80,000 over the panels’ lifetime. Retail rates of 15 to 20 cents per kWh do most of the work. NEM 3.0 cut the value of export, so battery storage now earns its keep on more roofs than it used to.
The California incentives you can actually stack
| Incentive | Type | Value | What it actually means |
|---|---|---|---|
| Federal Investment Tax Credit (ITC) | Tax credit | 30% of system cost | The single biggest lever. Owned systems only. Through 2032 at full rate. |
| Self-Generation Incentive Program (SGIP) | Battery rebate | $150-$1,000/kWh | For storage paired with solar. Bigger rebates for low-income and high-fire-risk households. |
| Net Energy Metering 3.0 (NEM 3.0) | Bill credit | ~$0.10-$0.15/kWh export | Translation, the old 1:1 retail credit is gone. Self-consumed kWh now beat exported kWh by a wide margin. |
| Active Solar Energy System Property Tax Exclusion | Tax exclusion | 100% of added home value | Solar doesn’t trigger a property tax reassessment in California. |
| Utility rebates | Direct rebate | $500-$2,000 | Spotty, by utility. Worth asking, never bank on. |
What solar actually costs in California
System size and pricing (after the 30% federal tax credit)
| System size | Typical wattage | Pre-incentive cost | After 30% ITC | Monthly (25yr loan) |
|---|---|---|---|---|
| Small | 3-4 kW | $9,000-$12,000 | $6,300-$8,400 | $252-$336 |
| Medium | 5-6 kW | $15,000-$18,000 | $10,500-$12,600 | $420-$504 |
| Large | 8-10 kW | $24,000-$30,000 | $16,800-$21,000 | $672-$840 |
| Premium | 12+ kW | $36,000-$42,000 | $25,200-$29,400 | $1,008-$1,176 |
Cost per watt
$2.50 to $3.50 per watt is typical for California residential solar after federal incentives. Installer, equipment tier, and roof complexity move the number inside that range.
The installers we’d quote first in California
- Sunrun. Largest residential installer in California. Cash, loan, lease, and PPA. Long track record on warranty service.
- Momentum Solar. Vertically integrated, in-house sales, design, and install crews. Serves California and roughly two dozen other states.
- A state-licensed local installer. Get at least one bid from a California-headquartered firm. They do their own install work and have community-level stakes in honoring the warranty.
- Palmetto. Streamlined process, competitive pricing, flexible financing. Strong customer reviews.
- Tesla Energy. Solar plus Powerwall, online management, premium warranty. Best fit if you want the battery from day one.
Whatever the list looks like, get three bids and confirm a current C-46 (solar) or C-10 (electrical) license before signing anything.
ROI and payback in California
Payback: 5 to 8 years. California’s retail rates (15 to 20 cents per kWh) and stacked incentives make the math work fast. NEM 3.0 pushed the median up about a year, not a decade. Most cash buyers break even inside this window.
25-year net savings: $40,000 to $80,000. Avoided electricity at rising rates does the heavy lifting. Battery owners on TOU plans skew toward the high end.
Home value: +3 to 4%. Owned solar tends to lift resale by a measurable amount. Leased systems don’t.
Buy vs. lease vs. PPA
| Option | Upfront cost | Payback | 25-yr savings | Tax credit |
|---|---|---|---|---|
| Purchase (loan) | $2,000-$5,000 | 5-8 yrs | $40,000-$80,000 | Yes (30% ITC) |
| Purchase (cash) | $10,000-$21,000 | 5-8 yrs | $40,000-$80,000 | Yes (30% ITC) |
| Lease | $0 | n/a | $5,000-$15,000 | No (goes to lessor) |
| PPA | $0 | n/a | $8,000-$18,000 | No (goes to provider) |
Buy it, don’t lease it, if you can use the ITC. Lease and PPA exist for people who can’t.
For the full federal credit rules and how to claim them, see our solar tax credits guide. Weighing cash, loan, lease, or PPA? Our solar financing guide compares all four paths. To model these factors against your own roof and rates, start with our solar ROI guide.