Analyzing your roof and energy use.
- Pinpointing your roof from satellite
- Measuring usable area and sun exposure
- Pulling your home's property records
- Checking PG&E rates and local permitting
- Sizing your system and building your price
What solar and a battery actually cost in the Bay Area.
Most Potrero projects land between $20k and $60k all in, with a typical payback of 5-12 yrs. These are complete project prices: solar, battery storage, design, installation, permitting, and PG&E hookup.
| System | Cash purchase, owned outright | Prepaid Energy Service |
|---|---|---|
6 kW solar + 14.3 kWh battery Moderate PG&E bills, simpler roofs | $25,900 | $20,700 |
8 kW solar + 28.6 kWh battery Typical Bay Area single-family home | $35,000 | $28,000 |
10 kW solar + 28.6 kWh battery + whole-home backup Bigger bills, outage protection for the whole house | $43,400 | $34,800 |
Prices computed from our current cost sheet. Cash purchase means you own the system outright from day one. The Prepaid Energy Service is a lower prepaid fee for a Potrero-owned and maintained system: pay once, no monthly payments. Your address may add local permitting or travel costs, and the calculator includes them automatically.
Solar cost questions, answered with real numbers.
Most Potrero solar and battery projects land between $20,000 and $60,000 all in: design, hardware, installation, permitting, and PG&E hookup. A typical 8 kW system with 28.6 kWh of battery storage runs about $35,000 as a cash purchase, or about $28,000 through the Prepaid Energy Service. The calculator above prices your actual roof and address, using the same math as these figures.
Each 14.3 kWh EG4 PowerPro battery module adds $5,720 before any program discount. Most homes install 28.6 kWh (two modules), which covers evening usage and keeps essentials running through an outage. The calculator lets you adjust battery size and watch the price change.
Wiring the system for whole-home backup adds $5,000 before any program discount. That covers the GridBoss transfer equipment and tie-in, so the whole house, not just a few circuits, runs during a PG&E outage or Public Safety Power Shutoff.
Yes. Design, permitting, project management, and PG&E hookup are all included in the base price. Some cities add local permitting costs and far-out addresses add travel, and the calculator prices both automatically from your address, so the number you see is the real starting price for your home, not a national average.
The federal residential solar tax credit ended for homeowner-owned systems placed in service after 2025. Business clean energy tax credits are still available for eligible company-owned systems, so Potrero offers the Prepaid Energy Service: Potrero owns, monitors and maintains the system for the service term, claims the business tax credit, and passes the value through as a lower prepaid fee with a savings guarantee and covered repairs. You pay once, with no monthly payments, and may buy the system at appraised fair market value from year six. The program is for solar-plus-battery systems; a battery-only system is a cash purchase. Prefer to own the hardware outright from day one? The cash purchase path does exactly that.
No. Enter your address and the calculator reads your roof from satellite and shows your price, savings, and payback with no email, no phone number, and no sales call. Contact comes later, only if you want an engineer to review the design with you.