Solar Companies in Fontana, CA: Who Installed the Most Systems in 2025

Installers who connected the most home solar systems in Fontana in 2025

Counts from utility records, not a ranking or endorsement. Check each license's status and complaint history on the CSLB's Check a License page (checked Sept. 24, 2026).

Source: California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026 (checked Sept. 24, 2026).

Home solar in Fontana by the numbers

SCE approved 1,249 home solar systems in Fontana in 2025, from 127 installers; the top three were named on 43% of them. The busiest year since 2021 was 2022, with 2,536 (2025: -51%). Another 446 were approved from January through May 2026.

2025 mix: 61% leased or on a power purchase agreement, 39% owned by the household; 71% with a battery; median size 6.06 kW DC. San Bernardino County: 58% leased or PPA, 75% with a battery, median 6.3 kW.

Hiring a solar company in Fontana

A solar company installing on a Fontana home files the design through SolarAPP+ ($25 review fee, licensed contractors only), then pulls the permit in the City's BUILD FONTANA portal and books a final building inspection. Your bill stays with Southern California Edison under its Solar Billing Plan. Get at least three written bids and compare them on the permit steps, the battery scope and the SCE bill left over.

The Fontana permit, step by step

The City of Fontana lays out the order: the contractor registers with SolarAPP+, submits the design and pays SolarAPP+'s $25 processing fee, downloads the approval document and its ID, and then applies for the City permit through the BUILD FONTANA online portal with those documents attached. Only licensed contractors may submit through SolarAPP+, and it handles residential projects only. The City accepts residential solar with energy storage on this path; building-integrated solar is not supported.

A SolarAPP+ permit in Fontana needs one building inspection, which the City calls the 899 Permit Final, scheduled through BUILD FONTANA or by phone at (909) 350-7693. If a bid tells you the permit is your job, or leaves the inspection to you, it is not quoting the same work as a bid that handles both.

Solar on a Fontana manufactured home

People in Fontana often ask about solar for mobile and manufactured homes. The California Department of Housing and Community Development says a permit is required before any alteration to a mobilehome or manufactured home begins, and it publishes its own alteration permit guidelines (HCD MH 604) and application forms. Fontana's SolarAPP+ page is written for residential solar in general and does not mention manufactured homes, so ask each bidder which agency will issue the permit for your home and whether its racking and roof attachments are designed for that structure before you compare prices.

A comparison to ask for

Put the same roof layout, shading and twelve months of SCE usage into every Fontana bid. Then compare the total price, financing terms, equipment, the permit scope and the SCE bill that remains after the system is installed. SCE says Solar Billing Plan export credits are worth less than the power you buy, so a bid that assumes every exported kWh offsets a full-price kWh is overstating the savings.

Verify the company behind the Fontana quote

Match the business name and license number on each Fontana proposal to the CSLB record, then use our contractor verification steps, the quote comparison guide and the PPA, loan, lease and cash comparison. What you pay the utility today is on the Fontana rates and bills page.

Fontana solar quote questions