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Before hiring a solar company, ask about its licenses, local experience, installation crews, system design, estimated production, equipment, roof evaluation, total price, financing, permits, warranties, and long-term service.
Request the important details in writing and compare several proposals before signing a solar contract.
Installing solar panels is a major home improvement project.
The company you choose can affect the system’s performance, appearance, cost, roof protection, and reliability for years.
A detailed proposal should explain more than how much your monthly payment may be.
It should show how the system was designed, how much electricity it is expected to produce, which equipment will be installed, what work is included, and who will help if a problem develops.
Use the following questions to ask solar companies during consultations.
Pay attention not only to the answer but also to how clearly the company explains it and whether its promises appear in writing.
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Start with these questions when comparing solar companies:
| Question | What a Good Answer Should Include | Potential Red Flag |
| Are you licensed and insured? | Current license and insurance information | Refusal to provide documentation |
| Who will install the system? | A clearly identified installation crew and project supervisor | The salesperson cannot identify the installer |
| How was the system designed? | Electricity usage, roof conditions, shade, weather, and future needs | A proposal created without reviewing the property |
| How much electricity will it produce? | Estimated annual production in kilowatt-hours with stated assumptions | Savings estimates without production data |
| Is my roof ready for solar? | An evaluation of roof age, condition, structure, and remaining life | Approval based only on satellite images |
| Which equipment will you install? | Exact model numbers for panels, inverters, racking, and batteries | Equipment brands without model numbers |
| What is the total cash price? | An itemized price showing included and excluded work | Discussion focused only on monthly payments |
| What are the financing terms? | APR, fees, loan length, financed amount, and total repayment | Unexplained differences between cash and financed prices |
| What warranties apply? | Separate equipment, performance, workmanship, and roof coverage | One vague warranty length used for everything |
| Who provides long-term service? | A defined service process and contact after installation | No clear support plan once the system is activated |
These questions provide a starting point.
The following sections explain what to ask, why each question matters, and which details should be included in the proposal or contract.
Let’s look at some of the main questions you should be asking your solar installer before signing the contract:
Ask the solar company to identify the licenses required for solar, electrical, and roofing work in your state or municipality.
You should also request proof of general liability insurance and workers’ compensation coverage.
Licensing and insurance requirements vary by location and project type, so a general statement that the company is “fully certified” is not enough.
Ask which business or individual holds each license and whether the license covers the work being performed on your home.
Professional solar certifications may provide additional evidence of training, but they do not replace licenses required by state or local authorities.
A company may have broad solar experience without being familiar with your municipality, utility provider, permitting office, weather, or building requirements.
Ask how many systems the company has installed in your area and whether it has completed projects with your electric utility.
Local experience can help an installer anticipate documentation requirements, inspections, utility applications, and common project delays.
For properties in Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island, Vermont, and Virginia, installers may also need to account for regional conditions such as snow, wind, coastal exposure, tree cover, roof construction, and seasonal electricity use.
Online reviews are useful, but direct references allow you to ask more detailed questions about the company’s communication and workmanship.
Request references from customers with projects similar to yours.
Ask whether the final price matched the proposal, whether the company explained delays clearly, and how it responded when questions or concerns arose.
You can also ask to see photographs of completed installations.
Look at panel placement, exposed conduit, equipment locations, roof penetrations, and the overall appearance of the work.
Some solar companies use in-house crews.
Others hire subcontractors for installation, electrical work, roofing, engineering, or service.
Using subcontractors is not automatically a problem.
What matters is whether responsibilities are clearly defined.
Ask who will work on your property, who supervises the crew, whose insurance applies, and who is responsible for correcting defective work.
Your agreement should prevent you from being caught between the salesperson, installer, roofer, and electrician if a problem develops.
Solar panels can remain in service for decades, but installation companies may change ownership or stop operating.
Ask which warranties come directly from equipment manufacturers and which depend on the installer.
Find out how you would request service if the original installer were no longer available.
Do not rely on a broad promise such as a “25-year solar warranty.”
That may refer only to panel performance and may not cover installation labor, inverter replacement, roof penetrations, troubleshooting, or equipment removal.
Let’s look at the questions you should be asking about your system design and production:
A solar company should not recommend a system based only on your average monthly electric bill.
The design should consider your electricity use in kilowatt-hours, available roof or ground space, shade, panel output, utility rules, and future energy needs.
Ask the installer to review at least 12 months of electricity usage when possible.
Seasonal data can reveal changes related to air conditioning, electric heating, pools, workshops, and other large loads.
The proposal should show:
Ask for the system’s estimated first-year electricity production in kilowatt-hours.
A dollar-savings estimate alone does not tell you how much energy the system is expected to generate.
The installer should explain which weather data, shade measurements, equipment specifications, and system-loss assumptions were used.
You should also ask whether the estimate accounts for normal reductions in panel output over time.
Production estimates are not necessarily guarantees.
Weather, shade, equipment performance, utility policies, and changes in household consumption can all affect actual results.
Energy offset is the percentage of your annual electricity consumption the solar system is expected to produce.
A 100% energy offset does not necessarily mean you will never receive another utility bill.
You may still pay fixed charges, minimum fees, taxes, or charges for electricity used when the system is not producing enough power.
Ask the installer to separate:
Solar panel production depends on roof direction, pitch, shade, nearby trees, chimneys, dormers, snow, weather, and equipment placement.
Ask whether the company completed an in-person shade and roof assessment or relied entirely on satellite imagery.
Remote tools can be useful, but an on-site evaluation may identify roof damage, obstructions, or future shade that cannot be seen clearly from aerial images.
The installer should also explain why panels are being placed on specific roof sections.
South-facing panels are common, but east- and west-facing layouts can also make sense depending on the property and the times of day when electricity is used.
Tell the installer about changes that may increase your electricity consumption, including:
Ask whether the roof layout, electrical panel, inverter configuration, and utility approval would allow the system to be expanded later.
Adding panels after the original installation may require new equipment, permits, labor, and utility review.
It may be more practical to account for predictable future needs during the original design.
Here are some questions you should be asking about your roof before installation:
Solar panels should be installed on a roof that can safely support the system and remain serviceable for years.
Ask the company to evaluate the roof’s:
A salesperson should not make a final roofing determination from the ground or from satellite imagery alone.
When the roof shows signs of wear, leaks, sagging, damaged shingles, or previous repairs, request an evaluation from a qualified roofing professional.
If the roof may need replacement during the expected life of the solar system, completing the roofing work first may help avoid the future cost of removing and reinstalling the panels.
Ask how the roof’s remaining service life compares with the expected life of the solar equipment.
You should also ask whether panel installation could affect an existing roofing warranty.
When different roofing and solar companies are involved, make sure both contractors agree on the mounting, flashing, materials, and warranty requirements.
Ask how the mounting system will be attached and sealed.
The solar company should explain who is responsible if a leak develops around an attachment point.
You should also understand what happens when the roof eventually needs repair or replacement.
Ask:
Here are some questions you should be asking about the solar system itself:
Do not accept a proposal that lists only equipment brands.
Request exact model numbers for:
Model numbers allow you to compare power ratings, efficiency, dimensions, compatibility, degradation terms, and warranty coverage.
Your contract should also explain what happens if the specified equipment becomes unavailable.
Any replacement should provide reasonably comparable specifications and warranties.
There is no single solar panel or inverter that is right for every home.
Ask why the recommended equipment is suitable for your roof, climate, shade conditions, electrical design, budget, and energy goals.
Then separate the warranties by category:
| Warranty Type | What to Ask |
| Product warranty | Which manufacturing defects are covered? |
| Performance warranty | How much output is promised after a set number of years? |
| Inverter warranty | How long is the inverter covered, and is replacement labor included? |
| Battery warranty | How are capacity, cycles, and replacement eligibility measured? |
| Workmanship warranty | Which installation problems are covered? |
| Roof-penetration coverage | How are solar-related leaks handled? |
Ask whether warranty service includes diagnosis, labor, shipping, equipment removal, and reinstallation.
A replacement part may be covered even when the labor needed to install it is not.
A standard grid-connected solar system generally shuts down during a utility outage to protect workers repairing power lines.
Solar panels alone therefore do not automatically provide backup power.
Ask whether the proposal includes:
Identify which appliances and circuits you want to operate.
Supporting a refrigerator, internet equipment, lights, and a few outlets requires a different design than supporting central air conditioning, electric heat, well pumps, or an entire home.
Monitoring allows you to review production and may help identify equipment or communication problems.
Ask whether monitoring is available at the system, inverter, or individual-panel level.
Find out whether it requires Wi-Fi, cellular service, a subscription, or a particular mobile application.
The company should explain:
Let’s look at some questions you should ask about the costs and incentives for your solar installation:
Request the total cash price even if you plan to finance the project.
The cash price provides a baseline for evaluating financing charges and comparing proposals.
Ask for an itemized scope showing whether the price includes:
Also ask which site conditions could increase the price after signing.
A low monthly payment does not necessarily mean a low total cost.
Ask for:
Some solar loans include fees that increase the financed price.
Compare the cash price with the financed amount and ask the company to explain the difference.
For leases and power purchase agreements, ask about annual payment increases, contract length, maintenance responsibilities, end-of-term options, system removal, and home-transfer requirements.
Solar incentives can change and may depend on your location, utility provider, system ownership, tax situation, property type, and installation date.
Ask the installer to identify each potential incentive separately and explain whether it is a:
Do not allow an estimated incentive to be automatically treated as guaranteed savings.
Solar companies are not tax advisers and should not promise that you will qualify for a particular tax benefit.
Verify current incentive rules through official sources or a qualified tax professional before making a financial decision.
Read the complete agreement before signing.
Ask:
The contract should explain how change orders are approved.
A company should not be able to replace equipment, move major components, or add substantial costs without documenting the change.
And finally let’s look at some questions about the long-term support of your solar panels:
A solar project may require design approval, building permits, electrical permits, structural documents, inspections, utility applications, meter changes, and permission to operate.
Ask which party handles each step and whether those services are included in the price.
The projected timeline should distinguish between:
Utility approval may occur after the physical installation is complete.
Ask for an estimated project timeline that includes design, engineering, permitting, equipment ordering, roofing work, installation, inspection, utility approval, and activation.
Weather, permit offices, equipment availability, design changes, roof conditions, and utility processing can affect the schedule.
A trustworthy company should explain potential delays rather than guaranteeing an activation date that depends on outside organizations.
Review the payment schedule as well.
Payments should correspond with clearly defined project milestones.
Equipment warranties do not cover every installation problem.
Ask for a separate written workmanship warranty explaining how the company handles:
Find out when the coverage begins, how long it lasts, which problems are excluded, and whether it transfers when the home is sold.
When separate roofing and solar companies are involved, confirm how each warranty will be protected.
When one company coordinates both services, ask how the roofing and solar responsibilities work together.
Before signing, learn what happens after the system is activated.
Ask whether the company has an in-house service department and how customers request help.
Find out whether troubleshooting, site visits, labor, shipping, equipment removal, and replacement may involve additional fees.
Solar systems generally require limited routine maintenance, but they should still be monitored.
The installer should explain:
If production is lower than expected, the cause may involve weather, increased household electricity use, new shade, utility-credit changes, equipment failure, or an installation problem.
Be cautious when a solar company:
Not every unclear answer means a company is dishonest.
It does mean you should pause, request clarification in writing, and compare the response with other proposals.
Preparing a few documents and notes can make the consultation more useful.
Bring or provide:
Ask each company the same solar panel questions.
Consistent questions make it easier to compare proposals fairly.
The right solar company should be willing to explain its recommendations, show how its estimates were calculated, and document its promises.
Before signing, compare the system design, estimated production, roof plan, equipment, total price, financing terms, warranties, and long-term service process.
Take time to read the complete agreement and ask follow-up questions whenever an answer is unclear.
Solar production and savings can vary based on the property, electricity use, weather, equipment, system design, utility policies, and future electricity rates.
Estimates should be treated as informed projections rather than guaranteed results unless a specific written guarantee applies.
Sunergy Solutions provides solar and roofing services for property owners in Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island, Vermont, and Virginia.
Evaluating the roof and solar system as parts of the same property can help homeowners make more informed decisions about panel placement, roof preparation, solar installation, and long-term protection.
Ask about licensing, insurance, local experience, installation crews, system design, estimated annual production, roof condition, equipment models, total price, financing, permits, warranties, and long-term service. Request the important details in writing before signing.
Comparing at least three detailed proposals can help you evaluate system designs, equipment, projected production, warranties, pricing, and financing. Make sure each company uses the same electricity-usage information.
Confirm its licenses and insurance, review recent customer feedback, request local references, and ask who will install and service the system. A reputable company should provide clear written information without pressuring you to sign immediately.
A complete solar quote should include the system size, panel count, equipment model numbers, estimated annual production, cash price, financing terms, scope of work, exclusions, warranties, responsibilities, and expected timeline.
Roof replacement may make sense when the roof is damaged or likely to reach the end of its service life well before the solar system. A qualified roof evaluation can help you avoid paying to remove and reinstall panels for an early roof replacement.
Most standard grid-connected systems shut down during an outage. Backup power generally requires compatible battery storage and additional electrical equipment. Ask which circuits the proposed system can support and for how long.
A solar company can estimate savings using expected production, electricity rates, utility policies, and household usage. Future weather, consumption, electricity prices, system performance, and policy changes make exact long-term savings difficult to guarantee.
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