Choosing the right company for a residential solar PV system in Fresno matters as much as choosing the equipment. The installer controls system design, permitting, interconnection paperwork, warranties, and ongoing service. This guide walks Fresno homeowners through the core checks, proposal comparisons, permitting and utility considerations, and consumer protections you should require before signing a contract.
1. Check the contractor’s California license and credentials
Ask for the company’s CSLB license number and verify it is active and in an appropriate classification (common ones for solar work include C-46 Solar Contractor, C-10 Electrical Contractor, or a B General Building Contractor). California requires contractors to be licensed for most jobs costing $1,000 or more, including labor and materials.
Also request:
- Insurance and workers’ compensation proof.
- Any subcontractor names and their license numbers (verify each separately).
- Business address, years in operation, and references for systems operating at least one year.
2. Get at least three detailed, comparable written proposals
Obtain a minimum of three bids so you can compare the full project, not just advertised monthly payments. Each written proposal should clearly list:
- Total system size in kilowatts (kW) and panel count.
- Panel manufacturer, model, and wattage; inverter or microinverter brand and model.
- Estimated annual production (kWh) with stated assumptions: shading, orientation, tilt, weather data, and degradation rate.
- All work included: roof attachments, repairs, main-panel upgrades, trenching, structural work, permits, taxes, and interconnection fees.
- Battery details if offered: usable capacity (kWh), continuous and surge power (kW), backed-up circuits, and warranty/throughput terms.
- Monitoring equipment and who is responsible for monitoring and service calls.
- Project timeline, inspection steps, who submits the interconnection application, and when legal permission to operate is expected.
Compare total installed cost, expected production, equipment warranties, financing cost, contract obligations, and realistic savings estimates rather than panel wattage alone.
3. Review roof and electrical readiness
Before finalizing a design, require an evaluation of roof age, material, pitch, remaining service life, structural capacity, and shading. If the roof needs replacement soon, plan that work before or coordinated with the solar installation.
Ask about main electrical panel capacity, any required upgrades, and whether the proposed layout supports planned electrification (EV charging, heat pumps). Confirm whether removing/reinstalling panels later will incur fees.
4. Understand Fresno permitting and interconnection
The City of Fresno uses SolarAPP+ for eligible residential rooftop PV projects (typically single-family homes and duplexes) to speed permitting. Commercial projects and some non-eligible parcels follow the standard permitting route. Confirm the permitting authority for your address — properties outside the City of Fresno or in unincorporated Fresno County may follow different rules.
Clarify who submits permit applications and the utility interconnection paperwork. The installer should explain how they handle utility corrections and when the utility will grant permission to operate.
5. Ask how the Solar Billing Plan (NBT) affects estimated savings
Many new interconnections in California now fall under the Solar Billing Plan / Net Billing Tariff (NBT). Under NBT, export credits for electricity sent to the grid are generally lower than retail rates, so on-site self-consumption and the timing of exports matter more. A good proposal will show expected self-consumption, grid exports and imports, applicable time-of-use (TOU) rates, and how a battery would change those flows.
Do not accept blanket promises such as “you will never pay an electric bill.” Billing details depend on your utility, tariff, and meter configuration and can change over time.
6. Decide whether a battery (BESS) makes sense
A battery can increase on-site use of solar generation, provide limited backup if designed for it, and reduce purchases during high TOU periods — but batteries are not interchangeable with the solar PV system itself. If a battery is proposed, the contract must specify usable capacity (not just nameplate), continuous and peak power, which circuits get backed up, whether the battery can recharge during outages, transfer-switch requirements, warranty terms, and permitting details.
7. Compare financing by total cost and contract terms
Compare cash, solar loans, leases, PPAs, and PACE by the total amount paid over the full term, APR, fees, escalators, prepayment penalties, and transfer or payoff impacts when selling or refinancing. Leases and PPAs may include escalators and can complicate home sales — get full contract language and disclosure of any liens.
8. Read required disclosure documents and know cancellation rights
California residential solar providers must give CSLB Solar Energy System Disclosure Documents before completing a sale, lease, or financing agreement. These documents include standardized savings assumptions and cancellation rights. Consumers generally have at least three business days to cancel; customers age 65 or older generally receive five business days, subject to limited exceptions. California also limits residential solar down payments to no more than $1,000 or 10% of the contract price, whichever is less.
Final installer checklist
- Active CSLB license in appropriate classification (C-46, C-10, or B) and verified subcontractor licenses.
- Proof of insurance and workers’ compensation.
- At least three written bids with system size, equipment models, and production assumptions.
- Roof and main-panel evaluation and plan for any necessary repairs or upgrades.
- Clear permitting path (SolarAPP+ eligibility if in City of Fresno) and interconnection responsibility.
- Production estimate with assumptions and degradation rate.
- Battery specifications, if included: usable kWh, power rating, backed-up circuits, warranty.
- Full contract with scope, price, payment schedule, start/completion dates, warranty responsibilities, change-order process, and cancellation language.
- Financing total-cost comparison and disclosure of liens or escrow requirements.
- Required CSLB disclosure documents and no high-pressure sales tactics.
Important tax and legal note: IRS guidance shows the federal Residential Clean Energy Credit applied to qualifying property placed in service from 2022 through December 31, 2025; it is not available for property placed in service after that date. Incentive, billing, and interconnection rules can change — verify current federal, state, utility, and local programs, and consult a qualified tax or financial professional before relying on incentives or making financial decisions.
Careful vetting of the installer, clear written proposals, and understanding local permitting and utility billing are the best ways to reduce surprises and get a solar PV system that meets your needs in Fresno.
