PG&E Service Area
Solar Panels in San Mateo County, California
VoltSol Energy serves 5 cities across San Mateo County with off-grid solar installations. Our EG4 battery systems start at $8,700 — designed to reduce your PG&E bill, provide backup power, and sidestep NEM 3.0 complexity.
County Snapshot — San Mateo 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 strong despite marine layer influence common on the Peninsula.
Permit Office
San Mateo County Planning and Building Department / Individual City Building Departments (San Mateo County / individual cities). Typical turnaround: 2-4 weeks; some cities adopting SolarAPP+. Redwood City, San Mateo, Daly City, and other cities have their own building departments. Unincorporated areas fall under San Mateo County Planning and Building. Several jurisdictions are adopting SolarAPP+ for expedited approval.
Climate Zone
Zone 3: Mild marine climate throughout the Peninsula. Coastal areas experience frequent marine layer, while inland areas (Redwood City, Menlo Park) see more sun. Moderate temperatures year-round with low cooling demand but reliable solar production.
County Context
San Mateo County encompasses the San Francisco Peninsula from the bay shoreline to the Pacific coast. Marine layer influence is common, especially along the coast and bay. Inland areas along Highway 101 (Redwood City, Menlo Park, San Mateo) experience less marine layer and better solar production. High PG&E rates throughout the county make solar economics strong despite lower cooling demand.
Why Solar in San Mateo County?
Homeowners in San Mateo County are served by PG&E, which has seen significant residential rate increases in recent years. Off-grid solar offers a way to lock in energy costs at installation prices and protect against future 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 — without relying on the grid. That means no utility buyback complexity under NEM 3.0, and backup power during PSPS shutoffs or outages.
With the 30% federal solar Investment Tax Credit (ITC) still available, the economics of solar in San Mateo County are stronger than ever. Consult a tax professional to confirm your specific eligibility.