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Not all solar quotes are created equal. Learn to compare $/W, equipment, warranties, financing terms, and included services — so you do not overpay or get a bad install.
Solar pricing varies more than most people expect. The same 8kW system can cost $24,000 from one installer and $35,000 from another — for roughly the same equipment and quality. The only way to know if you are getting a fair deal is to compare.
Three quotes give you enough data to understand the fair market price without spending weeks in sales meetings. With three quotes in hand, you can quickly spot the outliers (too expensive or suspiciously cheap) and identify the value sweet spot.
1 Quote
No comparison
You have no way to know if the price is fair or the equipment is appropriate.
2 Quotes
Better
You can see a range, but if both are high (or both are low), you will not know.
3+ Quotes
Ideal
You can identify fair market pricing, spot outliers, and compare equipment/warranty confidently.
Use this framework to evaluate any solar quote. Print this page, bring it to your consultations, and score each installer on all 7 points.
This is the only apples-to-apples price comparison metric. Total price means nothing without knowing system size.
What to Compare
Divide total installed price by system size in watts. Example: $28,000 / 8,000W = $3.50/W.
Good Range
$2.80-$3.80/W for residential in 2026 (varies by state)
Red flag: Any quote above $4.50/W or below $2.20/W deserves extra scrutiny.
Pro tip: Make sure all quotes include the same scope — permitting, interconnection, monitoring setup.
A $3.00/W quote with cheap unknown-brand panels is not the same as $3.00/W with Tier 1 equipment.
What to Compare
Compare panel brand, wattage, efficiency. Compare inverter brand and type (micro vs string).
Good Range
Tier 1 panels (Hyundai, Silfab, REC, Canadian Solar, Jinko) + Enphase or SolarEdge inverters
Red flag: Unknown panel brands, panels below 400W in 2026, or no inverter brand specified.
Pro tip: Ask each installer what tier of panels they use and why. Tier 1 panels cost only $0.05-$0.15/W more.
Quotes should be sized to your actual electricity usage, not to fill your entire roof.
What to Compare
System size in kilowatts (kW). Should be based on your 12-month electricity consumption.
Good Range
90-110% of your annual consumption (net-metering dependent)
Red flag: Widely different sizes between quotes without explanation, or system sized to 150%+ of usage.
Pro tip: Ask each installer how they calculated the system size. The best answer is: "We looked at your 12-month usage data."
Two 8kW systems can have very different production estimates based on panel placement, shading, and design tool assumptions.
What to Compare
Annual expected production in kilowatt-hours. Should include shading analysis.
Good Range
1,100-1,400 kWh per kW installed (varies by location and roof orientation)
Red flag: Production estimates that seem too high (1,600+ kWh/kW in New England) or that do not account for shading.
Pro tip: Ask if the production estimate includes shade modeling. If not, the number is optimistic.
This is the warranty that matters most. Panel and inverter warranties come from the manufacturer. The workmanship warranty comes from YOUR INSTALLER.
What to Compare
How many years does the installer warranty their installation work? Covers roof leaks, wiring, mounting.
Good Range
15-25 years (NuWatt offers 25 years)
Red flag: 5-year or 10-year workmanship warranties. This is the #1 differentiator between installers.
Pro tip: A 10-year workmanship warranty means if your roof leaks from a solar mount at year 11, you pay out of pocket.
In a post-ITC world, financing terms make or break the economics. Dealer fees can add $3,000-$8,000 to your total cost.
What to Compare
APR, loan term, monthly payment, dealer fees, and total cost of financing over the full term.
Good Range
Cash is cheapest. Loans: 5-8% APR, no dealer fee, 15-25 year term
Red flag: Dealer fees above 15%, APR shown as 0.99% (hiding 25-30% dealer fee), escalating payments in leases/PPAs.
Pro tip: Always ask: "What is the total amount I will pay over the full loan term, including all fees?" Compare THAT number.
Some installers include services that others charge extra for. This can shift the $/W comparison.
What to Compare
Permitting, interconnection application, utility enrollment (SMART, SREC, net metering), monitoring setup, critter guards.
Good Range
All of the above should be included in a professional installation
Red flag: Extra charges for permitting ($500-$1,500), interconnection ($200-$500), or monitoring setup ($200-$400).
Pro tip: NuWatt includes all of these in every install. If another quote does not, add those costs to their $/W.
NuWatt quotes include line-item pricing, equipment specs, production estimates with shading analysis, and our 25-year workmanship warranty.
Get a Transparent QuoteHere is what a real comparison might look like for an 8kW system in Massachusetts. The cheapest quote is not always the best value.
| Metric | Quote A | Quote B | Quote C (NuWatt) |
|---|---|---|---|
| System Size | 8.0 kW | 7.7 kW | 8.0 kW |
| Total Price | $25,600 | $29,500 | $27,200 |
| $/W Installed | $3.20/W | $3.83/W | $3.40/W |
| Panel Brand | Unknown (380W) | Canadian Solar 440W | Silfab 440W (FEOC) |
| Inverter | String (SMA) | Enphase IQ8+ | Enphase IQ8+ |
| Est. Production | 9,800 kWh/yr | 9,600 kWh/yr | 9,900 kWh/yr |
| Workmanship Warranty | 10 years | 15 years | 25 years |
| Includes Permitting | Yes | Yes | Yes |
| Includes Critter Guards | No (+$400) | No (+$500) | Yes (included) |
| Financing APR | 1.49% (25% dealer fee) | 6.99% (no fee) | 7.49% (no fee) |
Quote A looks cheapest at $3.20/W, but uses unknown panels, a string inverter (10-15yr lifespan), and only a 10-year workmanship warranty. The 1.49% APR hides a 25% dealer fee — the actual loan amount is $32,000, not $25,600. Quote B has good equipment but is oversized at 7.7kW. Quote C (NuWatt) offers FEOC-compliant panels, Enphase microinverters, 25-year workmanship warranty, included critter guards, and transparent financing with no dealer fee.
The solar industry has gotten much more professional over the years, but bad actors still exist. Watch for these warning signs.
Door-to-door salesperson with "today only" pricing
Legitimate solar companies do not use high-pressure sales tactics. If the price changes by tomorrow, it was never real.
Quote references a 30% federal tax credit for homeowners
The residential solar tax credit (Section 25D) expired December 31, 2025. Any company still advertising a 30% homeowner tax credit is either uninformed or dishonest.
0.99% or 1.49% APR financing
These ultra-low rates always have a dealer fee baked in — typically 15-30% of the system cost added to the loan balance. A $30,000 system becomes a $36,000-$39,000 loan.
"Free solar panels" or "$0 down, $0/month"
Nothing is free. This is either a solar lease or PPA where you pay for electricity from the panels. You do not own them, and you cannot sell them with your home easily.
No site visit before quoting
A quote without a site visit (or at minimum detailed satellite analysis) is a guess. Roof condition, electrical panel, shading, and structural capacity all affect the real price.
Won't provide a line-item breakdown
If an installer will not show you what you are paying for (panels, inverter, labor, permitting, BOS), they may be hiding inflated margins.
Pressure to sign before getting other quotes
Reputable installers encourage you to compare. If someone pressures you to sign immediately, they know their quote will not survive comparison.
Guaranteeing specific dollar savings without seeing your bill
Anyone promising "you will save $X per month" before analyzing your actual usage and utility rate is making up numbers.
The single biggest gotcha in solar financing is the dealer fee. Here is how it works and why it matters.
Advertised APR: 1.49%
System cost: $28,000
Dealer fee: 25% = $7,000
Actual loan balance: $35,000
Monthly payment: $140
Total paid over 25 years: $42,000
Advertised APR: 7.49%
System cost: $28,000
Dealer fee: $0
Actual loan balance: $28,000
Monthly payment: $210
Total paid over 25 years: $38,900
The "low rate" loan costs $3,100 more over its lifetime because of the hidden dealer fee. Always compare total cost of financing — not just the monthly payment or APR.
Every quote breaks down panels, inverters, labor, BOS, permitting, and monitoring — no hidden line items.
Our financing partners offer competitive rates without inflating your loan balance with hidden fees.
Industry-leading installation warranty. We stand behind our work for as long as your panels produce.
Get at least 3 quotes from different installers. This gives you enough data to understand the fair market price for your area and system size. More than 5 quotes has diminishing returns — you will spend more time evaluating than you gain in savings.
In 2026, residential solar typically costs $2.80-$3.80 per watt installed, depending on your state, system size, equipment tier, and installer. Remember: the residential federal tax credit (25D) expired at the end of 2025, so there is no longer a 30% discount on cash/loan purchases.
Not automatically. The cheapest quote may use lower-tier equipment, shorter warranties, or cut corners on installation quality. Compare $/W WITH equipment tier and workmanship warranty. A $3.20/W quote with 25-year workmanship and Enphase microinverters is almost always a better value than a $2.80/W quote with 10-year warranty and string inverters.
A dealer fee is a percentage the solar installer pays the financing company to buy down your interest rate. The fee (typically 15-30% of the system cost) is added to your loan balance. So a $30,000 system with a 25% dealer fee becomes a $37,500 loan. This is how "1.49% APR" loans work — the low rate hides a massive fee.
Use price per watt ($/W) to normalize the comparison. Divide total installed cost by system size in watts. Then compare production per kW to see if larger systems are justified by your actual energy needs.
Three warranties matter: panel product warranty (25-30yr, from manufacturer), panel performance warranty (25yr, guarantees output), and workmanship warranty (5-25yr, from your installer). The workmanship warranty is the most variable and most important — it covers installation quality, roof leaks, and wiring.
Premium panels (like REC Alpha) cost about $0.15-$0.20/W more than entry panels but degrade more slowly (0.25% vs 0.50%/yr). Over 25 years, this means about 5% more total production. On an 8kW system, that is roughly $400 more upfront for about $2,000 more in lifetime energy savings. Usually worth it.
A detailed solar quote typically takes 2-5 business days after an initial consultation. The installer needs your electricity bills (12 months), satellite or drone imagery of your roof, and your electrical panel specifications. Beware of "instant quotes" — they are estimates, not real quotes.
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