What Homeowners Should Check Before Signing Any Solar Contract

A solar contract is not something to skim while a salesperson waits at the kitchen table.

It affects your roof, your utility bills, your financing, your home value, and your long-term support. That is why every homeowner should use a clear solar contract checklist before signing solar contract documents in California.

This guide is not legal advice. It is a practical review list to help you ask better questions, spot solar contract red flags, and know when to pause and speak with a qualified professional.

Bright Solar Power believes homeowners should understand every part of a proposal before moving forward. No pressure. No confusing numbers. Just clear answers.

Use This Solar Contract Checklist Before You Sign

Before you sign any California solar contract, confirm these items in writing:

• Who is selling the system

• Who is installing it

• What license number applies

• What equipment is included

• What the full project cost is

• What your loan, lease, or PPA terms mean

• What warranties apply

• What happens if you sell the home

• What cancellation rights you have

• What promises are actually written into the agreement

The CPUC says homeowners should have time to read the California Solar Consumer Protection Guide before signing, and solar providers in major California utility territories must collect customer initials and signatures on the guide for residential interconnection applications.

1. Check the Contractor License and Company Background

Start with the solar company’s CSLB license number.

California guidance tells homeowners to verify the solar provider’s CSLB license and, when applicable, the home improvement salesperson registration number before signing. 

The CPUC also notes that valid solar work should be tied to active CSLB classifications such as C-46 Solar Contractor, C-10 Electrical Contractor, or B General Building Contractor.

Ask these questions:

• What is the company’s CSLB license number?

• Is the installer the same company selling the system?

• Will subcontractors be used?

• What is the subcontractor’s CSLB license number?

• Is the salesperson registered if required?

• How long has the company been doing solar work?

This matters because some solar companies sell the deal, then hand the project to another installer. That is not always bad, but you should know who will be on your roof.

Bright Solar Power works with vetted, licensed, and bonded installation partners and is willing to explain who is involved before a homeowner moves forward.

2. Review the Total Cost and Solar Financing Terms

Do not focus only on the monthly payment.

A low monthly payment can hide a higher total contract amount, dealer fees, escalators, long loan terms, or future payment changes. 

California’s CSLB solar disclosure rules require important cost and payment information to appear in the Solar Energy System Disclosure Document, including total system cost, monthly costs, financing costs, and cancellation information.

Check for:

• Cash price

• Financed price

• Loan term

• Interest rate

• Dealer fees or lender fees

• Monthly payment

• Payment changes after an introductory period

• Lease or PPA escalators

• Ownership structure

• Tax credit assumptions

• PACE financing terms, if applicable

If a proposal says your tax credit will reduce your payment later, ask what happens if you do not qualify for the tax credit or do not apply it to the loan.

For a PPA or lease, confirm who owns the system, who maintains it, whether payments increase each year, and how the agreement transfers if you sell.

3. Confirm the Exact Equipment Being Installed

Your solar contract should list the equipment clearly.

Look for the solar equipment specifications, including:

• Panel brand and model

• Panel wattage

• Inverter brand and model

• Battery brand, model, and usable capacity, if included

• Racking system

• Monitoring platform

• Main panel upgrades, if needed

• EV charger or add-on equipment, if included

Do not accept vague wording like “premium panels” or “high-efficiency inverter” without model details.

If equipment changes later, ask for a written change order before installation. The contract should explain whether substitutions are allowed and whether replacement equipment must be equal or better.

4. Understand Production Estimates and Savings Claims

A solar proposal should explain how expected production and savings were calculated.

Ask what utility rate, usage history, shade data, roof direction, panel layout, and annual electricity rate escalation were used. 

The CPUC warns homeowners to ask how bill savings were calculated and states that solar providers are allowed to use a maximum electricity rate escalation of 10% in calculations as of 2025.

Watch for claims like:

• “Your electric bill will disappear forever.”

• “Solar is free.”

• “You must sign today.”

• “The government will pay for everything.”

• “This price is only available right now.”

More information on how to spot common solar sales lies & misinformation for California homeowners here.

The CPUC specifically flags “free solar” and rushed tablet-signing tactics as claims homeowners should avoid.

Bright Solar Power’s approach is to review 12 months of energy usage so the system is designed around real consumption, not one high bill or a rough guess.

5. Ask About Roof Condition Before Solar Installation

Solar panels can last a long time, so your roof needs to be ready.

Before signing, ask:

• Is my roof in good enough condition for solar?

• Will roof work be needed first?

• Who will perform the roof work?

• Is that contractor licensed?

• Is roof work included in the solar contract or separate?

• What happens if leaks appear later?

• What roof penetration warranty applies?

The CPUC recommends asking whether the roof needs replacement before solar, how much it would cost, who would do it, and whether a roof warranty applies.

This is where solar and roofing should be reviewed together. Bright Solar Power offers solar, battery, and residential roofing support, which helps homeowners avoid installing panels on a roof that may need major work soon.