Buyer Guide
How Much Does Solar Cost in San Diego County?
San Diego pays some of the highest electricity rates in the country, and that changes the math on solar. In 2026 homeowners here have two real options: a no upfront cost PPA, which is what roughly 90% of California installs choose today, or a lease-to-own purchase that runs $20,000 to $40,000 depending on panels and battery.
Option 1: No upfront cost PPA (what most San Diego homeowners pick)
A Power Purchase Agreement is $0 down. You aren't buying equipment. You're changing who your power provider is. Instead of paying SDG&E their peak rate, you pay a lower fixed per kWh rate for the clean power your own roof produces and your battery stores. Everything is warrantied for 25 years, including panels, inverter, battery, roof penetrations, monitoring, and labor, with a production guarantee behind it.
- Down payment: $0
- Monthly cost: a lower fixed solar rate on the power your roof and battery deliver
- Typical savings: 20 to 40% off your energy costs
- Coverage: full 25 year warranty, production guarantee included
SDG&E's rate structure is why the PPA wins so decisively in San Diego County. When peak power costs more than $0.60 per kWh, replacing it with a lower fixed solar rate produces real monthly savings from day one.
Option 2: Lease-to-own (ownership at year 6)
Lease-to-own is a purchase path. Because the federal solar tax credit isn't something most San Diego homeowners can practically use anymore, the 30% incentive is applied upfront as a direct discount on the purchase price, payable in cash or rolled into financing. Ownership of the system transfers to you at year 6.
- Typical total cost: $20,000 to $40,000 depending on panel count and battery configuration
- 30% incentive: discounted upfront off the purchase price, no tax filing required
- Ownership transfer: year 6
- Financing: cash or financed monthly
Lease-to-own is a fit for a smaller group of homeowners who specifically want ownership on the roof and have the capital for it. For most San Diego households, the PPA is the cleaner path.
What actually drives the cost in San Diego
Two things move the number more than anything else: how much power your house uses and whether you need one battery or two. Under NEM 3.0, a battery isn't optional in California. Solar without storage exports power to SDG&E at pennies and buys it back during the 4 to 9 p.m. peak window at $0.60 or more per kWh. Storing your own excess on the side of the house is what puts you in control and keeps the savings on your side.
- Annual usage from your last 12 months of SDG&E bills
- Panel count needed to cover that usage
- Battery capacity (one Powerwall vs two)
- Roof pitch, shading, and main panel condition
- Coastal vs inland climate (AC load in inland North County pushes system size up)
Which one is right for your house?
If your average SDG&E bill is $200 or more, a no upfront cost PPA almost always comes out ahead. You get solar and a battery on the roof for $0 down, a lower fixed rate on your usage, and a 25 year warranty behind the whole system. Lease-to-own is worth pricing out if you want ownership and are prepared for the capital.
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Get a real number for your house
Every San Diego roof and every SDG&E bill is different. Send us your last 12 months of usage and we'll model both a PPA and a lease-to-own quote against your actual house, so you can compare the real numbers side by side.