Step 1: Set Expectations with a Solar Calculator First
Before you talk to a single installer, use a solar calculator to understand what system size you need, what production to expect, and roughly what you should pay. This gives you a baseline to evaluate quotes against — and immediately exposes installers who are oversizing (to inflate price) or undersizing (to offer a deceptively low quote).
The most important number to know before you shop: your last 12 months of electricity usage in kilowatt-hours (kWh). Find this on your utility bills or in your utility's online portal. The average US home uses about 10,500 kWh/year, but if you have an EV or electric heating, yours could be 15,000–20,000 kWh/year.
Get Your Baseline First: Use our free solar calculator to understand your ideal system size and savings estimate before talking to installers. You'll negotiate from a position of knowledge instead of letting the installer define your expectations.
Calculate My Solar Savings →
Step 2: Get 3–5 Quotes Minimum
The solar industry has documented this consistently: homeowners who get 3 or more quotes pay an average of $5,000 less than those who accept the first quote. Why? Because solar pricing is not standardized — labor costs vary by company, equipment markups vary wildly, and companies know that most customers don't shop around.
Getting multiple quotes takes a few hours of your time and costs absolutely nothing. Every reputable installer provides free, no-obligation quotes. If a company charges for a quote or pressures you not to get competing bids, walk away.
Where to Get Solar Quotes
- EnergySage Marketplace: Submit your information once, receive 2–7 quotes from pre-vetted local installers, compare them in a standardized format. The marketplace format drives competition — installers know they're being compared side-by-side and typically price more competitively. Average savings of 10–15% vs. direct quotes according to EnergySage's own data.
- Direct outreach to local installers: Search for installers with strong Google reviews (4.5+ stars, 50+ reviews), NABCEP certification, and a physical office address. Call or email 2–3 directly to supplement marketplace quotes.
- National installers (Sunrun, SunPower, Tesla Energy): Useful for comparison but be aware national companies often price 15–25% higher than local competitors for equivalent systems. They offer branded consistency but you pay for it.
What Every Legitimate Solar Quote Must Include
A professional solar quote is a detailed document, not a one-page flyer. If any of these elements are missing, ask for them — and be skeptical if the installer can't or won't provide them.
Equipment Details
- Exact panel brand, model, and wattage (e.g., "REC Alpha Pure 440W")
- Number of panels and total system wattage
- Inverter brand and model (string, power optimizer, or microinverter)
- Battery (if included) brand, model, and capacity
- Mounting hardware brand and type
Production and Savings
- Estimated annual production in kWh (not just a percentage)
- How production was estimated (PVWatts, System Advisor Model, or proprietary tool)
- Assumed degradation rate over 25 years
- Year 1 estimated savings in dollars
- Payback period calculation
Warranties
- Panel product warranty (typically 12–25 years)
- Panel performance/power warranty (typically 25 years at 80–92% output)
- Inverter warranty (5–25 years depending on type)
- Workmanship/installation warranty (minimum 10 years from reputable installer)
- Roof penetration warranty (who covers leaks?)
Process and Pricing
- Permit and inspection fees (must be included)
- Utility interconnection application (must be handled by installer)
- Installation timeline in writing
- All financing options: cash, loan, lease, PPA
- Itemized cost breakdown (not just one total number)
Red Flags: Solar Scams and Predatory Practices
The solar industry, like any large home improvement sector, has bad actors. These are the specific red flags that should cause you to stop the conversation and walk away:
"Today Only" or High-Pressure Pricing
Any installer who tells you "this price is only valid today" or creates artificial urgency is using manipulative sales tactics. Legitimate solar companies do not have flash sales. Material costs vary, but a professional installer does not need your decision in 24 hours. Walk out of any meeting where this tactic is used.
- No physical office address: Look up the company on Google Maps. If they have no verifiable physical location, they may be a fly-by-night operation that disappears after installation, leaving you with no warranty support.
- No customer references willing to speak with you: A legitimate installer with 50+ completed installations should have no problem providing 3–5 references. If they can't or won't, be very cautious.
- Full cash payment upfront: Reputable installers take a deposit (10–25%) and final payment after installation and inspection. Never pay 100% upfront. You lose all leverage if problems arise.
- Lease-only with no purchase option: Some installers only offer leases and never mention purchase or loan options. This may be because their business model depends on leasing (they get more recurring revenue). Always ask for a cash or loan quote alongside any lease quote.
- No NABCEP-certified installer: Ask specifically: "Will a NABCEP-certified PV Installation Professional be on my installation crew?" If the answer is no, ask why. In many states, NABCEP certification is required for permit approval.
- Promises of "free solar" or 100% bill elimination: No solar system is free — someone is always paying (usually via a 25-year lease). And no solar system consistently eliminates 100% of your electricity bill in all conditions. These promises are marketing at best and fraud at worst.
- Vague or missing equipment specs: If a quote just says "solar panels" without brand and model, the installer is reserving the right to install lower-quality equipment than you're expecting. Always get specific model numbers.
How to Compare Quotes Properly
Don't compare total price in isolation — a quote for a larger system costs more but produces more. The right comparison metric is cost per watt ($/W).
Quote A: 8,000W system at $22,400$2.80/W
Quote B: 8,000W system at $26,400$3.30/W
Quote C: 10,000W system at $29,000$2.90/W
Competitive range in 2026$2.50–3.20/W
Quote A and C are in the competitive range. Quote B is 18% above average and warrants asking: what premium equipment or additional services justify the higher price? If the installer says "premium panels," check the actual panel brand — premium panels typically add $0.10–0.20/W, not $0.50/W.
Also compare production guarantees: if Quote A projects 10,500 kWh/year and Quote B projects 13,500 kWh/year for the same 8kW system at the same address, one of them is using unrealistic production assumptions. Use PVWatts (free NREL tool) to independently verify production estimates using your address and system specs.
6 Questions to Ask Every Installer
Q1: "Who exactly will be installing my system?"
Good answer: "Our own W-2 employees, led by a NABCEP-certified installer." Red flag: "We use subcontractors" (follow up on who they are and their certifications).
Q2: "How do you estimate my system's production?"
Good answer: Names a specific tool (PVWatts, SAM, HelioScope) and explains assumptions. Red flag: Vague answer like "based on our experience."
Q3: "What happens if my system underproduces?"
Good answer: Explains production guarantee terms, what triggers a remediation, and what remediation looks like. Red flag: No production guarantee offered.
Q4: "Are permits and interconnection included in this price?"
Good answer: "Yes, everything including AHJ permit, utility interconnection application, and final inspection is included." Red flag: "There may be additional fees for permits."
Q5: "How long have you been in business and how many systems have you installed in my area?"
Good answer: 5+ years, 200+ local installations, and can provide references nearby. Red flag: New company or can't provide references in your metro area.
Q6: "What is my workmanship warranty and who backs it if your company closes?"
Good answer: 10-year minimum workmanship warranty, mentions third-party warranty insurance (like Solar Insure or Sunrun's own backing). Red flag: 1–2 year workmanship warranty or no clear answer about what happens if the company folds.
Frequently Asked Questions
How many solar quotes should I get?
Get at least 3 quotes, ideally 4–5. Research consistently shows homeowners who receive 3 or more quotes save an average of $5,000 compared to those who accept the first offer. Quotes are free, take no more than a few hours of your time, and installers fully expect shopping around. Use a marketplace like EnergySage to streamline the process.
What is a good price per watt for solar in 2026?
The national average installed cost for residential solar in 2026 is approximately $2.80–3.10 per watt before incentives. Quotes in the $2.50–3.20/W range are competitive. Anything above $3.50/W warrants scrutiny and requires justification (premium panels, complex roof, high-cost labor market). Quotes below $2.20/W may indicate lower-quality components, commission-only sales models, or hidden fees that appear later.
What is NABCEP certification and why does it matter?
NABCEP (North American Board of Certified Energy Practitioners) is the gold standard certification for solar installers. A NABCEP-certified PV Installation Professional has passed rigorous exams covering electrical code, system design, and safety, and has demonstrated field experience. Require at least one NABCEP-certified professional on your installation crew. Many states require it for permit approval, and it's a reliable indicator of professional competence.
How long should solar installation take?
Physical installation takes 1–3 days for most residential systems. However, the full process from signed contract to system activation typically takes 2–4 months due to permit applications, utility interconnection approval, and inspection scheduling. In California, utility approval alone can take 2–3 months. Any quote promising system activation in 2–3 weeks is unrealistic in most jurisdictions and may indicate a company planning to skip proper permitting.