PG&E Service Area
Solar + Battery Storage in Napa County, CA
VoltSol gives 4 cities across Napa 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 — Napa County
Utility Rate
PG&E: Estimated $0.44/kWh residential rate. PG&E serves this premium wine-country region with rates averaging $0.44/kWh. Wildfire risk and PSPS events make battery backup attractive for high-value properties.
Permit Office
Napa County Planning, Building & Environmental Services (Napa County). Typical turnaround: 2-4 weeks. County processes permits for wine-country installations. Hillside vineyard sites may have additional requirements. Fire-resistant design encouraged in high-risk zones.
Climate Zone
Zone 2 (Wine Country): Mediterranean climate with hot dry summers and mild winters. Hillside vineyard terrain and wildfire risk create PSPS vulnerability. Excellent solar conditions.
County Context
Napa County is California's premier wine region, anchored by Napa, American Canyon, Calistoga, and St. Helena. Hot summers bring excellent solar production at 5.0-5.2 peak sun hours. Wildfire history (Glass Fire, Hennessey Fire) and PSPS events make battery backup attractive for high-value wine-country properties. Affluent market with strong demand for premium solar and battery systems.
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 Napa County?
Homeowners in Napa 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 Napa 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.