What should a solar quote include? A homeowner’s checklist
A solar quote is the starting point of one of the more complex long-term financial agreements a homeowner can sign. Here’s what a good one should answer — and what to ask if it doesn’t.
Going solar can be a life-improving financial decision: lower ongoing energy costs, more resilience when the grid goes down, and a hedge against rising utility rates for as long as you own your home. But, if the terms are bad or the quote is incomplete, panels can become an ongoing source of stress, unexpected expense, and — in the worst cases — a complication that makes the house difficult to sell.
Unfortunately, the “Bad” scenario is still more common than it should be. As a homeowner you need to know what questions to ask to make sure you end up with a great result.
This post is a checklist of what a good solar quote should answer. Every homeowner’s situation is different, of course, so there’s rarely a single “right” answer to these questions. But you should get a clear, specific answer to every question before you sign on the dotted line.
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In this article:
- What equipment is being installed?
- Who will actually do the work?
- When does work start, and how long will it take?
- Is a main panel upgrade required — and is it included?
- What are the permitting and interconnection fees?
- What are the financial terms?
- Who handles ongoing maintenance?
- Will there be a lien on your home?
- What happens if the roof is damaged?
- Frequently asked questions
What equipment is being installed?
A good quote names the exact equipment being proposed — make, model, and specifications — not just marketing language.
You should see the solar panel model (e.g., “Qcells Q.PEAK DUO BLK ML-G10+ 400W”), the inverter model, and the mounting hardware. Phrases like “premium tier-1 panels” or “high-efficiency inverter” without specific model numbers are sales language, not specifications. You can’t compare quotes or be sure what you’re getting with inexact information.
Look for the total system size in kilowatts (kW), the number of panels, and the expected annual energy production in kilowatt-hours (kWh). That production figure should be specific to your home, roof, and location — not a generic industry average.
Each piece of equipment also has its own warranty. Panels typically carry 25-year production warranties. Inverters are often 10–12 years, sometimes extendable. Know what you’re getting before you sign.
Who will actually do the work?
The company selling you solar and the company installing it are not always the same.
Large solar companies often use subcontractors for installation. There’s nothing inherently wrong with that, but you have a right to know who will be on your roof, whether they are properly licensed and insured, and who to call if something goes wrong during or after the job is done.
A good quote or sales conversation should be able to tell you the name of the installing company (or confirm the work will be done in-house), whether they are licensed and insured in your state, and what the workmanship warranty covers. Make a note if the salesperson can’t answer these questions or deflects when you ask them.
When does work start, and how long will it take?
Solar installations involve multiple stages: design, permitting, installation, utility inspection, and interconnection. The full process from signed contract to system activation can take 2–4 months, sometimes longer depending on your utility and local permit authority.
A reputable installer should be able to give you an estimated timeline for each phase — not a guarantee, since permit and utility timelines aren’t always within the installer’s control, but a reasonable projection based on their experience in your area. Vague answers (“it depends”) without any specifics are a flag.
Ask: What happens if the timeline slips significantly? What recourse do you have if the project stalls after you’ve signed?
Is a main panel upgrade required — and is it included?
A main panel upgrade (MPU) is an upgrade to your home’s electrical service panel, and is often required when a solar system is added to an older home with a smaller panel that can’t handle the additional load. MPUs can cost anywhere from $1,500 to $4,000 or more depending on the scope of work.
The critical question is whether the cost is included in the quoted price. Some installers include it; others quote the solar system and list the MPU as a separate line item or, worse, present it as a surprise cost after you’ve signed.
Ask: Based on your assessment of my home, do you anticipate a panel upgrade will be needed? If so, is that cost included in this quote?
What are the permitting and interconnection fees?
Every solar installation requires a permit from your local jurisdiction and an interconnection agreement with your utility company before the system can go live. These fees always exist — the question is who pays them.
Some installers cover permitting and interconnection fees in their pricing; others pass them through to the homeowner as a separate charge. Either way is fine, just make sure you know what each estimate includes so you can compare accurately.
Some jurisdictions require the system owner to be the one that pays the fees directly. A good quote makes this explicit. If the quote is silent on this, ask: What are the permit fees, what are the utility interconnection fees, and are they included in this price?
This is also a good moment to ask who manages the permitting and utility application process. A full-service installer usually handles this on your behalf, but, as the homeowner you are ultimately responsible, so due diligence on your part is prudent.
What are the financial terms?
This is the most important section of any solar quote, and the one most likely to contain fine print worth reading carefully.
A complete picture of the financial terms should answer all of the following questions:
What is the ongoing monthly payment, if any? For loans, leases, and PPAs, this is your regular payment obligation. Confirm the amount, the term length, and whether payments change over time. Some leases include annual escalator clauses (built-in payment increases each year). PPA lock-in $/kWh purchase rate term may expire before the end of system life.
What upfront payment, if any, is required? Cash purchases and some loan products require upfront payment. Prepaid leases involve a large upfront sum in exchange for low or no monthly payments. Know exactly what you’re committing to at signing.
Are there any conditional fees — and how do they work? Some contracts include fees tied to specific circumstances: early termination fees, production shortfall penalties, or fees for modifying the system (adding panels, replacing equipment). These don’t affect most homeowners, but they can matter a lot in specific situations like selling your home or expanding your system. Read the fine print on any conditional terms before signing.
Don’t be afraid to ask every detailed or “dumb” question you have until you feel satisfied you understand the terms of the financial agreement. Unwillingness or inability to answer detailed questions about this topic and/or pushing you to sign before you feel comfortable doing so is a huge red flag.
Who handles ongoing maintenance?
Solar panels are low-maintenance, but they’re not zero-maintenance. Individual panels can fail, as can inverters. Monitoring systems can go offline. Panels need occasional cleaning or inspection. Over a 20–25 year system life, some service will be required.
The answer to who’s responsible depends on your financing structure:
- If you own the system (cash or loan), you’re responsible for these costs. Most installers offer service contracts; some include a workmanship warranty for a set number of years.
- If you lease or have a PPA, the company that owns the system is typically responsible for maintenance. Confirm this is clearly spelled out in the contract — and ask what their actual service response process looks like.
Also, all solar panels and other hardware come with a manufacturer warranty. The exact terms of these warranties vary from manufacturer to manufacturer, ask your sales rep for more information.
Either way, get clarity on who to call if something stops working, what the expected response time is, and whether service calls are covered or billed separately.
Will there be a lien on your home?
This is a question that surprises many homeowners, but it’s important.
Some solar financing arrangements — particularly certain loan types and leases — involve a UCC-1 fixture filing or similar lien on your home. This is a legal claim that notifies other parties (like a future buyer’s lender) that a third party has an interest in the solar equipment. It’s not inherently problematic, but it can complicate a home sale if it’s not handled correctly.
Ask: Will this financing arrangement result in any lien, UCC filing, or encumbrance on my home or property? If yes, ask how it gets removed when you sell, and who is responsible for handling that process.
What happens if the roof is damaged?
Any time workers are on your roof installing equipment, there’s a possibility of damage — and solar panels are attached to your roof for decades. Damage can be immediate (a cracked tile, a missed flashing point) or delayed (a slow leak that doesn’t show up until the first heavy rain weeks after installation).
A good installer carries liability insurance that covers roof damage, and their contract should spell out the process for damage claims.
Ask: What is your policy if installation damages my roof? What if damage isn’t discovered until after the installation is complete? Make sure you’re comfortable with the answer — and that the installer’s insurance coverage is current and adequate — before work begins.
The bottom line
A trustworthy solar sales professional should be able to answer every question on this list without hesitation, and should be happy to do it. If they can’t, or if the answers are vague, that itself is pretty useful information!
This isn’t meant to make solar shopping feel overwhelming — most installations go smoothly, and the benefits are real. But solar is a significant financial commitment, and a few targeted questions up front can protect you from a much larger headache down the road.
If you want to understand what’s common in your area — typical pricing, standard terms, what a competitive quote looks like — the best starting point is getting multiple quotes and comparing them side by side.
Compare estimates from trusted local installers and see your real options, all in one place.
Frequently asked questions
What should a solar quote include?
A complete solar quote should specify the exact equipment being installed (panel and inverter make and model), who will perform the installation, the full financial terms (monthly payment, upfront costs, any escalators or conditional fees), whether a main panel upgrade is needed and whether it’s included in the price, permitting and interconnection fees, who handles ongoing maintenance, and whether a lien will be placed on the home.
How do I compare solar quotes from different companies?
Compare quotes on the same terms: total system size in kW, expected annual production in kWh, total contract price, and cost per watt. Make sure each quote covers the same scope — some may include the main panel upgrade or permitting fees, others may not. Equipment quality matters too; look up the specific panel and inverter models rather than relying on vague descriptions like “premium” or “tier-1.”
What is a main panel upgrade, and do I need one?
A main panel upgrade (MPU) replaces or upgrades your home’s electrical service panel may be required when adding solar to older homes. Not every home needs one, often an MPU upgrade can be avoided by configuring the solar inverter output correctly. Your installer should be able to assess this during the site evaluation. If one is needed, confirm whether the cost is included in the quote before signing.
What is a UCC filing on a solar system?
A UCC-1 (Uniform Commercial Code) fixture filing is a legal notice that a lender or leasing company has a security interest in the solar equipment attached to your home. It’s common with certain loan and lease structures and isn’t necessarily a problem — but it needs to be properly removed when you sell your home. Ask any solar company upfront whether their financing arrangement involves a UCC filing and who handles its removal at sale.
What questions should I ask before signing a solar contract?
At minimum: What exact equipment is being installed? Who is doing the installation, and are they licensed and insured? Is a panel upgrade needed, and is it included? What are the permitting and interconnection fees, and who pays them? What are the full financial terms, including any escalators or conditional fees? Who handles maintenance? Will there be a lien on my home? What happens if the roof is damaged? A reputable installer will answer all of these without hesitation.
