Getting multiple solar quotes is the single most important thing you can do to avoid overpaying — but not all quotes are comparable, and the lowest number isn’t always the best deal. Solar system prices vary by 30–50% between quotes for the same home, equipment quality varies significantly, and long-term warranties and service commitments differ just as much as the upfront price. Knowing how to structure the quote process and what to look for in each proposal puts you in control.
This guide covers how many quotes to get, what information to provide, how to make quotes comparable, and the specific numbers and terms to evaluate before signing anything.
Get at Least Three Quotes — From Different Types of Companies
The industry standard recommendation is three quotes minimum. The reason: the solar market has significant price dispersion, and installers price their work based on local competition, overhead structure, and customer acquisition cost. A national brand with high marketing spend may quote 20–40% above a local installer for identical hardware.
Include at least one of each type in your quote pool:
National installer (SunPower, Sunrun, Tesla Energy, Freedom Solar): Typically more expensive but offer in-house financing, comprehensive warranties, and often-cited brand recognition. Their price includes significant customer acquisition cost (marketing, sales commissions) which is passed to you.
Regional installer (50–500 employees, multi-state presence): Often the best combination of competitive pricing, professional installation quality, and long-term company stability. NABCEP-certified installers at this scale have proven track records.
Local installer (1–30 employees, single-market focus): Potentially the lowest price but verify company age (3+ years minimum), NABCEP certification, reviews, and licensing. A local installer that goes out of business after installation leaves you without workmanship warranty support.
Avoid getting all quotes from the same referral source (e.g., all from one lead generation platform) — the prices will cluster because installers on the same platform know who they’re competing against.
Prepare Your Home Information Before Requesting Quotes
Having your information ready makes quotes faster and more accurate:
12 months of electricity bills: Your total annual kWh usage is the primary input for system sizing. If you can’t find bills, call your utility for a usage history. Give installers actual kWh usage, not just dollar amounts — rates vary, and dollars can be misleading.
Expected future changes: Tell installers about planned changes that will significantly affect electricity use — EV purchase in the next 2 years, adding central air conditioning, a planned home addition. Sizing the system for future load prevents a costly system expansion later.
Roof age and material: If your roof is within 5–7 years of needing replacement, tell installers upfront. Installing solar on a roof that needs replacement in 3 years means paying for panel removal and reinstallation (typically $2,000–$5,000) when the roof is replaced. Some installers will recommend a roof replacement before installation if it’s warranted.
Shading obstructions: Note any trees, chimneys, dormers, or neighboring structures that shade your roof, especially in the afternoon. Experienced installers will conduct their own shading assessment (using Aurora Solar, Solargraf, or an on-site shade analysis tool), but your awareness of shading issues helps focus the assessment.
What Every Quote Must Include
A professional solar quote should include all of the following. Missing items should be requested before you compare quotes:
System size in kW DC and kW AC: The DC rating (panel nameplate capacity) and AC rating (inverter output capacity). DC/AC ratios of 1.1–1.3 are normal. A 10 kW DC system with a 7.6 kW AC inverter has a DC/AC ratio of 1.31.
Annual production estimate in kWh: This is the most important comparison metric. Quotes using the same size system but different equipment or assumptions will show different production estimates. Verify that estimates use PVWatts or a comparable validated model, not an inflated proprietary number. A production estimate 20% above the local PVWatts figure should be questioned.
Panel brand, model, and wattage: Know exactly which panels are being quoted. Tier 1 manufacturers (Panasonic, REC, Q CELLS, Canadian Solar, Jinko, Longi, SunPower) have established quality track records. Look up the panel’s independent test data (PVEL module scorecard) if you want to verify actual field performance vs rated specs.
Inverter brand, model, and type: String inverter, microinverters (Enphase IQ8+), or DC optimizers (SolarEdge). Each has different shading performance, monitoring capability, and warranty length. Enphase microinverters carry 25-year warranties; SolarEdge string inverters are 12 years standard. A quote using a no-name inverter to hit a low price point is a reliability risk.
Racking brand and type: IronRidge, Unirac, Schletter, and Quick Mount PV are reputable racking brands. Racking failure causes panel falls and roof damage — this is not where to accept an unknown brand.
Estimated cost per watt DC: Divide total system price (before incentives) by system size in watts DC. The 2026 US national average for residential solar is $2.50–$3.50/watt depending on market, system size, and equipment tier. Quotes significantly above $4.00/watt should be scrutinized; quotes significantly below $2.00/watt may indicate compromised equipment or labor quality.
Workmanship warranty duration: Industry minimum is 10 years. Quality installers offer 25 years. The workmanship warranty covers installation defects — roof penetration leaks, wiring faults, mounting issues. This warranty is only as good as the company’s longevity.
Comparing Quotes Apples-to-Apples
Once you have multiple quotes, create a simple comparison spreadsheet with these rows for each quote:
System size (kW DC) | Total price before incentives | Price per watt DC | Annual production estimate (kWh) | Cost per kWh produced (price ÷ annual kWh × 25-year lifespan) | Panel brand and efficiency | Inverter type and warranty | Workmanship warranty | Finance options and terms
The cost per kWh produced over 25 years is the most useful single metric for comparing quotes with different system sizes. Calculate it as: Total system price ÷ (Annual kWh estimate × 25 years). This puts a $28,000 system producing 12,000 kWh/year and a $24,000 system producing 9,000 kWh/year on the same basis. Lower $/kWh = better long-term value.
Check that production estimates are realistic by cross-referencing with NREL’s PVWatts calculator (pvwatts.nrel.gov) — it’s free, uses real weather data, and gives a trustworthy independent estimate for your location and system size. If a quote’s production estimate is more than 10–15% above PVWatts, ask the installer to explain the difference.
Red Flags in Solar Quotes
High-pressure sales tactics or same-day-only pricing: Legitimate solar companies don’t expire quotes in 24 hours. Any installer who pushes you to sign before getting competing quotes is not acting in your interest. The savings from comparison shopping far exceed any “limited time” discount.
Inflated production estimates: An overestimated production figure makes a proposal look better than it is. If actual production comes in 15–20% below estimate, your payback period extends proportionally. Always verify estimates against PVWatts.
No mention of permits or interconnection: All grid-tied solar installations require electrical permits, building permits (in most jurisdictions), and utility interconnection applications. If a quote doesn’t mention permits and interconnection, ask whether they’re included in the price — they should be.
Unbranded or mystery equipment: Quotes that list “350W monocrystalline panel” without naming the manufacturer are hiding something. Reputable installers use panels and inverters they stand behind by name. Request the specific model numbers for all equipment.
No workmanship warranty or warranty under 5 years: The industry standard is 10 years minimum. A company offering less is either new, financially unstable, or cutting corners.
Contractor license or NABCEP certification not verifiable: Ask for the installer’s state electrical contractor license number and verify it on your state licensing board’s website. NABCEP certification is the industry’s premier professional credential — ask if the installation team has NABCEP-certified personnel on staff.
Financing Considerations When Comparing Quotes
If you’re financing the system rather than paying cash, the loan terms are as important as the system price:
Dealer fees on solar loans: Many solar loans offered by installers include a “dealer fee” of 10–30% that is added to the loan principal but not reflected in the quoted system price. A $30,000 system with a 25% dealer fee becomes a $37,500 loan. Ask for the full loan amount, not just the monthly payment.
Compare loan APR: Solar loan APRs range from 2.99% to 9.99% in 2026 depending on credit score, loan term, and lender. Get the APR (not just monthly payment) for any financed option.
PACE financing: Property Assessed Clean Energy loans are attached to the property, not the borrower. They can have unfavorable terms and complicate home sales — research PACE carefully before agreeing to this financing type.
Frequently Asked Questions
How many solar quotes should I get?
Get at least three quotes from installers of different sizes — ideally one national, one regional, and one local installer. Research consistently shows that homeowners who get three or more quotes save 10–20% compared to those who accept the first quote. The additional time investment (a few hours for site visits and proposal review) is well worth the potential savings of $3,000–$8,000 on a typical residential system.
What is a fair price for solar installation in 2026?
The US national average for residential solar installation is $2.50–$3.50 per watt DC installed, before any incentives. For a 7 kW system, this translates to $17,500–$24,500. High-cost markets (California urban, Hawaii, New England) trend toward the upper end; competitive markets (Texas, Arizona, Florida) trend toward the lower end. Prices below $2.00/watt should trigger questions about equipment and labor quality.
Should I choose the cheapest solar quote?
Not automatically. The lowest price may reflect lower-tier equipment with shorter warranties, a newer company with limited track record, or a proposal that excludes permits, interconnection, or monitoring. Compare cost per kWh produced over 25 years (not just upfront price), verify equipment brands, and check the company’s licensing, reviews, and warranty terms before deciding. A slightly higher-priced proposal with better equipment and warranty may be superior on long-term value.
What is NABCEP certification and does it matter?
NABCEP (North American Board of Certified Energy Practitioners) is the solar industry’s premier professional certification for installation technicians and system designers. NABCEP PV Installation Professional certification requires passing a rigorous exam, demonstrating field experience, and adhering to a code of ethics. While not legally required in all states, NABCEP-certified installers have demonstrated knowledge of NEC code compliance, system design, and installation best practices. Choose an installer with NABCEP-certified personnel on staff.
How long does a solar quote process take?
From initial contact to receiving a written quote typically takes 3–7 days: a site visit or remote assessment (1–2 hours), system design (1–3 days), and proposal delivery. Getting three quotes in parallel takes the same calendar time as getting them sequentially — contact all three installers at once, schedule site visits in the same week, and you can compare quotes within 2 weeks of starting. Review and sign typically takes another 1–2 weeks, and installation follows permit approval (2–6 weeks depending on jurisdiction).
Summing Up
Getting the best solar quote requires three things: getting at least three quotes from different types of installers, making them comparable (same size basis, production-per-dollar metric, equipment quality verified by model number), and knowing the red flags that indicate an unreliable proposal. Price per watt is a useful rough comparison, but cost per kWh produced over 25 years is the most meaningful metric for comparing proposals that differ in system size, production estimate, or equipment quality.
Ready to start comparing solar quotes? Call (855) 427-0058 to connect with pre-screened local installers in your area. Get multiple quotes at no cost or obligation and find the best solar value for your home.
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