title: How to Choose a Solar Installer updated: 2026-02-10 difficulty: Intro tags: ["solar", "installer", "contractor", "shopping", "vetting"] summary: A step-by-step guide to finding, vetting, and selecting a reputable solar installation company.
How to Choose a Solar Installer
The installer you choose affects the quality, warranty, cost, and long-term performance of your solar investment. A great system with a bad installer can mean years of headaches. Here's how to choose well.
Step 1: Get Multiple Quotes
Minimum 3 quotes, ideally 5. Solar pricing varies 15–30% between installers for the same system. More quotes give you a better sense of fair market pricing.
Where to Find Installers
- EnergySage: Online marketplace; receive multiple quotes without sales calls
- Google "solar installers [your city]": Find local companies with Google reviews
- NABCEP directory: nabcep.org/certified-professionals — the gold standard certification for solar professionals
- Word of mouth: Ask neighbors, coworkers, or local community groups who have solar
- Avoid door-to-door salespeople: High-pressure sales with inflated prices are common in door-to-door solar sales
Step 2: Verify Credentials
Minimum Requirements
- State contractor's license: Verify on your state's licensing board website
- Electrical license (or licensed electrician subcontractor)
- General liability insurance: $1M+ coverage
- Workers' compensation insurance: Required in most states
- NABCEP certification: Not legally required but strongly recommended — indicates serious training and competence
Red Flags
- No physical office (operates solely from a personal cell phone)
- Won't provide license numbers or insurance certificates
- Very new company with no installation track record
- Unusually low prices (may indicate corner-cutting)
- Heavy reliance on subcontractors they've never worked with
Step 3: Evaluate Experience
| Experience Level | Assessment | |:-:|---| | Under 50 installs | Very new — higher risk of inexperience | | 50–200 installs | Developing — check references carefully | | 200–1,000 installs | Established — reasonable experience | | 1,000+ installs | Very experienced — should have refined processes |
Ask specifically:
- How many systems have you installed in this county/municipality? (Local permitting knowledge matters)
- How many of those are similar to my proposed system (roof type, size, equipment)?
- What is your average time from contract to Permission to Operate (PTO)?
Step 4: Compare Quotes Carefully
What Should Be in a Solar Quote
- System size in kW (DC rating)
- Equipment specifications: Panel brand/model, inverter brand/model, racking
- Number of panels
- Estimated annual production in kWh
- Total cost before incentives
- Federal tax credit value (they should NOT subtract this — you claim the credit yourself)
- Net cost after tax credit
- Price per watt (total cost ÷ system size in watts — industry standard comparison metric)
- Warranty details: Product, performance, workmanship, inverter
- Timeline: Estimated time to design, permit, install, inspect, and achieve PTO
- Payment schedule: Milestones and amounts
2025–2026 Pricing Benchmarks
| System Size | Fair Price Range (before incentives) | Price per Watt | |:-:|:-:|:-:| | 6 kW | $15,000–$21,000 | $2.50–$3.50/W | | 8 kW | $19,000–$26,000 | $2.40–$3.30/W | | 10 kW | $23,000–$30,000 | $2.30–$3.00/W | | 12 kW | $27,000–$34,000 | $2.25–$2.85/W |
Prices vary significantly by state. California, Massachusetts, and New York tend toward the higher end. Texas, Arizona, and Florida tend lower.
Step 5: Check Equipment Quality
Ensure the installer is proposing Tier 1 equipment:
Panels: LONGi, JA Solar, Canadian Solar, Trina (value); Q CELLS, REC, SunPower/Maxeon (premium). 25-year product + 25-30 year performance warranties minimum.
Inverters: Enphase IQ8 (microinverters), SolarEdge (optimizers), SMA, Fronius (string). Match the inverter choice to your roof situation.
Racking: IronRidge, Unirac, Quick Mount PV, SnapNrack (established brands with proper engineering certifications).
Equipment Red Flags
- Unknown panel brands with limited U.S. market presence
- String inverter with no rapid shutdown compliance
- No warranty documentation provided with the proposal
- "Equivalent" equipment substitution clauses without your approval
Step 6: Review the Contract
Before signing, ensure the contract includes:
- Exact equipment specifications (brand, model numbers — not "or equivalent")
- Total price, payment schedule, and cancellation policy
- Workmanship warranty duration and coverage details
- Responsibility for permits, HOA approval, and utility interconnection
- Timeline commitments (or at least estimates)
- Change order process (what happens if design changes after engineering review)
- Roof warranty: Does the installer warrant the roof penetrations? For how long?
Payment Schedule (Reasonable)
- 10–20% deposit at contract signing
- 30–40% at equipment delivery / installation start
- Remaining balance at system completion and passing inspection
- Never 100% upfront. Hold final payment until the system passes inspection and receives PTO.
Step 7: Check Reviews and References
- Google Reviews: Look for patterns, not just the star rating. How does the company respond to negative reviews?
- BBB: Check for complaints and resolution patterns
- SolarReviews.com: Industry-specific review platform
- Ask for 3–5 recent customer references and actually call them
- Ask references specifically:
- Was the system installed on schedule?
- Were there any issues? How were they resolved?
- Is your system producing as promised?
- Would you use this company again?
National vs. Local Installers
| Factor | National (Sunrun, ADT Solar, etc.) | Local/Regional | |--------|:-:|:-:| | Price | Often higher (higher overhead, marketing) | Often 10–20% lower | | Warranty | Corporate-backed (may be stronger) | Company-backed (depends on viability) | | Customer service | Call centers; can be impersonal | Direct access to owner/crew | | Equipment choice | Often limited to their contracted brands | Often more flexible | | Permitting knowledge | May struggle with local nuances | Typically strong local expertise | | Long-term support | Company likely exists in 20 years | Less certain |
Bottom line: Get quotes from both. Many homeowners find local installers offer better value and service, but national companies provide more predictable warranty support.
Common Mistakes to Avoid
- Signing at the kitchen table during a sales visit. Always take at least 48 hours to review a proposal.
- Choosing based on price alone. The cheapest bid may use inferior equipment or cut corners on installation quality.
- Not reading the financing terms. Solar loans and especially leases/PPAs have terms that significantly affect your economics.
- Paying the full amount upfront. Always hold a final payment until inspection and PTO.
- Skipping the contract review. Read every page. Ask about anything unclear.
- Ignoring the workmanship warranty. This covers the most likely failure mode (installation issues).