A neighbor of mine — Dave, in Phoenix — went with the lowest quote he could find. Six months later, the installer had folded, the workmanship warranty was worthless, and his roof leaked. The system worked fine. The roof didn't.
Choosing a solar installer isn't just about price. It's about who stands behind the work five years from now. These 10 questions cut through the sales pitch fast.
- Ask about NABCEP certification and subcontractor use before anything else.
- Walk away immediately from same-day pressure tactics or vague verbal warranties.
- Buying beats leasing in most scenarios — especially if you plan to sell your home.
- Get at least 3 quotes to establish a real price baseline.
10 Questions to Ask Before You Sign
Work through this list with every installer you meet. Their answers — and their hesitation — tell you everything.
- Are you NABCEP-certified, or do you use NABCEP-certified installers? NABCEP is the industry gold standard — not legally required everywhere, but it signals serious training over a weekend certification course.
- Who actually does the install — your crew or subcontractors? Many companies sell the job and hand it off; you deserve to know who's on your roof and who's accountable when something goes wrong.
- What does the workmanship warranty cover and for how long? Equipment warranties come from manufacturers — workmanship covers the installer's labor. Ten years is reasonable; two years is a red flag.
- What production monitoring system do you use and who has access? Ask if you get your own app login to verify output — not just the installer's word that everything is performing.
- Are you licensed, bonded, and insured in my state? An unlicensed installer leaves you with zero recourse — verify this before anything else.
- How many installs have you completed in the past 12 months? A company doing 200 installs a year has worked out the kinks. A startup doing 12 hasn't.
- Do you handle permits and utility interconnection, or is that on me? Good installers manage this end-to-end — if they're pushing it back to you, expect delays and extra hassle you didn't sign up for.
- What happens if my roof needs repairs after install? Will they remove and reinstall panels, and at what cost? This catches more homeowners off guard than almost anything else.
- Can I see references or local reviews? Online reviews are fine; a phone number for two recent local customers is better.
- What financing options do you offer — loan, lease, or cash? The structure affects your tax credit eligibility and total cost significantly — know this before they start pitching you.
Red Flags That Should Make You Walk Away
Pressure to sign same-day ("this price expires tonight") is a manipulation tactic, not a real deadline. Walk away. Other dealbreakers: no physical local office, warranties offered only verbally, refusal to provide a detailed written proposal with equipment specs and production estimates, and quotes dramatically lower than everyone else's with no explanation. If a quote seems suspiciously low, ask what equipment they're substituting — the answer usually explains everything. And if they push back on negotiating based on competing bids, that's another reason to leave.
The cheapest quote is often the riskiest — hidden equipment downgrades, subcontractor chains, and thin margins mean corners get cut somewhere.
Get at least 3 quotes. You'll spot outliers — both high and suspiciously low — immediately.
Lease vs. Buy — and Contract Terms That Bite
Buying means you own the system, claim the federal Investment Tax Credit (30%), and face no complications when you sell. Leasing keeps upfront costs near zero — but it comes with real tradeoffs worth understanding before you commit.
| Factor | Buy | Lease |
|---|---|---|
| Ownership | You own it | Installer owns it |
| ITC Eligible | Yes (30%) | No |
| Home Sale Impact | Clean transfer | Buyer must assume lease |
| Upfront Cost | Higher | Low or $0 |
| Monthly Cost Escalation | None | 2–3% annually (common) |
If the contract is dense and you're unsure, $150–200 for an attorney review is cheap insurance. For a full breakdown of lease structures, escalator clauses, and exit penalties, see our lease vs. buy guide.
The right solar installer is licensed, uses their own crew, handles permits, and puts everything in writing. Ask the 10 questions above, collect 3 quotes minimum, and never sign the same day you're pitched.
Frequently Asked Questions
Should I go with the cheapest solar installer quote?
Rarely. Low quotes often hide equipment substitutions, inexperienced subcontractors, or missing permit costs. Use the cheapest quote to negotiate with a more reputable installer — don't just take it.
What certifications should a solar installer have?
NABCEP (North American Board of Certified Energy Practitioners) is the industry standard. Also verify state licensing, contractor bonding, and liability insurance before signing anything.
How many solar quotes should I get before deciding?
Three is the minimum. It establishes a real price baseline and shows you the range of equipment options and warranty terms available in your area.
See what solar could actually produce for your home — before you talk to a single installer.
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