PG&E Service Area
Solar + Battery Storage in Solano County, CA
VoltSol gives 4 cities across Solano County a way to energy independence: residential solar paired with EG4 battery storage, from $8,700. Make your own power, store it, and keep the lights on through blackouts and PSPS shutoffs — instead of exporting it back to the grid for a fraction of what you paid under NEM 3.0.
County Snapshot — Solano County
Utility Rate
PG&E: Estimated $0.44/kWh residential rate. PG&E residential blended rate (E-TOU-C tier, 2025-2026 range). High rates make solar economics very strong, especially for inland areas (Fairfield, Vacaville) with high cooling demand.
Permit Office
Solano County Resource Management / City Building Departments (Fairfield, Vacaville, Vallejo, Benicia) (Solano County / individual cities). Typical turnaround: 2-4 weeks. Permit timelines vary by jurisdiction. Fairfield, Vacaville, Vallejo, and Benicia each have their own city building departments. Unincorporated areas fall under Solano County Resource Management.
Climate Zone
Zone 12: Hot-dry summer with mild winter for inland areas (Fairfield, Vacaville). Coastal areas (Vallejo, Benicia) experience more moderate temperatures with marine influence but still see strong solar production.
County Context
Solano County spans from the inland valley (Fairfield, Vacaville) to the San Francisco Bay waterfront (Vallejo, Benicia). Inland areas experience hot summers with high cooling demand, while coastal areas have more moderate temperatures. High PG&E rates throughout the county make solar economics strong. The county is strategically located between Sacramento and the Bay Area.
Tax credit, exemption, and incentive information is general and subject to change. Consult a licensed tax professional and your county appraisal district (or equivalent local authority) for guidance specific to your situation.
Why Solar + Battery Storage in Solano County?
Homeowners in Solano County are served by PG&E, which has seen significant residential rate increases in recent years. Residential solar + battery storage offers a way to lock in energy costs at installation prices and protect against future rate hikes.
Our systems combine rooftop solar panels, EG4 battery storage, and inverters to power your home's most energy-intensive loads — like heating, cooling, and major appliances — while maximizing the power you keep and use yourself. That means no utility buyback complexity under NEM 3.0, and backup power during PSPS shutoffs or outages.
Under California's current net-billing rules (NEM 3.0), the credit homeowners receive for solar energy they export is typically only a small fraction of the retail price they pay to buy electricity back. The smart economics in Solano County shifted to storing and using your own power instead of selling it back. The federal 30% residential solar tax credit ended for systems placed in service after Dec 31, 2025, but California programs like SGIP battery rebates may still apply. Consult a tax professional to confirm your eligibility.