Going solar is one of the best financial and environmental decisions you can make — but only if you choose the right installer. The solar industry has exploded in recent years, and not all companies are created equal. Before you sign anything, here are the 7 essential questions to ask every solar installer you consider.
1. Are You Licensed, Bonded, and Insured?
This is non-negotiable. A legitimate solar installer must carry a valid contractor’s license in your state, general liability insurance, and worker’s compensation. Ask to see proof — any reputable company will provide it without hesitation. Unlicensed contractors can expose you to major liability if something goes wrong on your roof.
What to look for: State electrical and/or general contractor license, minimum $1M liability coverage.
2. How Long Have You Been Installing Solar in My Area?
Local experience matters enormously. An installer familiar with your area knows the local utility interconnection process, common roof types, permitting requirements, and even which sun angles to optimize for. Out-of-state companies that parachute in for a boom-and-bust cycle often leave homeowners stranded when issues arise later.
What to look for: At least 3–5 years of local installations. Ask for references from neighbors or nearby homeowners.
3. What Equipment Brands Do You Use — and Why?
Not all solar panels and inverters are equal. Top-tier manufacturers like LG, Panasonic, REC, SunPower, or Qcells offer panels with proven performance and long warranty periods. For inverters, look at Enphase, SMA, or SolarEdge. Ask your installer why they chose their equipment — if they can’t explain it, that’s a red flag.
What to look for: Tier 1 solar panels, microinverters or string inverters with monitoring, minimum 25-year panel warranty.
4. What Does the Warranty Actually Cover?
Solar warranties are layered and confusing. You’ll typically get:
- Panel product warranty (10–25 years): covers manufacturing defects
- Panel performance warranty (25–30 years): guarantees output doesn’t drop below a threshold
- Inverter warranty (5–25 years depending on brand)
- Workmanship/installation warranty (typically 5–10 years)
The installation warranty is the one most often overlooked. A cheap installer may offer only 1–2 years. If your roof leaks from improper flashing, you need someone who’ll come back and fix it.
What to look for: Workmanship warranty of at least 5–10 years, clearly written in the contract.
5. Can You Show Me a Detailed, Itemized Quote?
A vague quote is a red flag. You should know exactly what you’re paying for: number of panels, wattage, inverter model, mounting hardware, labor, permits, and grid interconnection fees. Reputable installers will also provide a production estimate showing how many kWh your system will generate per year and what that means for your bill.
What to look for: Line-item quote with all equipment specified, annual production estimate, clear breakdown of incentives (federal tax credit, state rebates, net metering).
6. How Do You Handle Permits and Utility Interconnection?
Going solar involves local building permits, electrical inspections, and utility approval before your system can turn on. Some installers drag their feet on this, leaving systems installed but non-operational for months. Ask exactly who handles permits, what the typical timeline is in your area, and whether delays have been an issue in the past.
What to look for: Installer handles all permitting, typical timeline of 4–8 weeks from install to permission-to-operate (PTO).
7. What Financing Options Do You Offer — and What Are the Full Terms?
Cash purchase gives the best return, but loans, leases, and PPAs (Power Purchase Agreements) are all on the table. Each has very different financial implications:
- Cash/Loan: You own the system and get the full federal tax credit (currently 30% under the IRA)
- Lease/PPA: Installer owns the system; you pay a monthly fee or per-kWh rate. Simpler, but you don’t get the tax credit and it can complicate home sales.
Watch out for dealers who push 25-year solar loans with high dealer fees hidden in the “adjusted” system cost.
What to look for: Full APR disclosure on loans, no prepayment penalties, clarity on who claims the 30% federal tax credit.
Bonus: Get at Least 3 Quotes
Solar pricing varies wildly — sometimes by $5,000–$15,000 for the same system. Use comparison platforms like EnergySage to collect multiple quotes without the high-pressure sales tactics. The cheapest isn’t always best, but neither is the most expensive.
Recommended Tools & Products
Once your system is installed, a quality solar monitoring setup helps you track performance and catch issues early:
- Solar Panel Monitoring Systems on Amazon
- Home Solar Battery Storage Options
- Solar Panel Cleaning Kits — dirty panels lose up to 25% efficiency
Final Thoughts
The right solar installer is a long-term partner, not just a one-time contractor. Take your time with the selection process — the questions above will separate the professionals from the door-knockers. Your roof will thank you, your wallet will thank you, and so will the planet.
Ready to start your solar journey? Drop your questions in the comments — we’re happy to help you navigate the process.