Solar buyer guides
Source-backed explanations of solar price per watt, published national cost data, and financing choices, plus free tools for quote comparison and loan math.
Free solar decision tools
Quote evaluation
- solar quote red flagsSolar Quote Red Flags: 12 Checks Before You SignA red flag is a reason to verify a claim in writing—not proof that every unfamiliar term is dishonest.
- how to read a solar quoteHow to Read a Solar Quote: A Homeowner ChecklistTurn a sales presentation into a small set of numbers, documents, and written responsibilities you can compare.
- solar contractSolar Contract Checklist: What to Verify Before SigningThe contract should preserve the deal you believe you accepted, including every material promise and responsibility.
- solar price per wattSolar Price per Watt: Calculate and Compare QuotesPrice per watt is a useful first screen only when the numerator and denominator describe the same solar scope.
Costs and system sizing
- solar panel costSolar Panel Cost & Price per WattPrice per watt puts differently sized solar proposals on the same basis; a published national distribution can provide context without declaring a local quote fair or unfair.
- solar panel cost calculatorSolar Cost Calculator: 2024 DataApply Berkeley Lab's published 2024 U.S. 20th-percentile, median, and 80th-percentile installed prices to a selected system size, with the limitations visible.
- how many solar panels do I needHow Many Solar Panels Do I Need? A Quote-Sizing GuidePanel count is the output of a system design; annual usage and expected production should drive the design first.
Payback and return
Financing and incentives
- solar financingSolar Financing Options ComparedCompare who owns the system, what the contract makes you pay, and the written terms to request for cash, loans, leases, and PPAs.
- solar tax credit 2026Solar Tax Credit 2026: The Federal Residential Credit EndedA 2026 proposal should not build homeowner savings around a federal residential credit that is no longer available.
- solar loan dealer feesSolar Loan Dealer Fees: Compare Cash and Financed PricesA low advertised APR can accompany a higher financed project price, so compare price and credit terms together.
- solar lease vs buySolar Lease vs Buy: Compare Cost, Control, and RiskThe choice is not only monthly payment versus purchase price; it changes ownership, control, transfer, and long-term obligations.
- solar lease vs PPASolar Lease vs PPA: Payment and Contract DifferencesBoth commonly use third-party ownership, but one usually charges for the system and the other for electricity produced.
- net meteringWhat Is Net Metering? How Solar Bill Credits WorkNet metering is the quiet engine behind most solar savings — and the rate your utility uses is changing in ways that can reshape your payback.
Equipment and warranties
- solar panel warrantySolar Panel Warranty Guide: Product, Performance, and LaborA long warranty headline is not the same as complete coverage for parts, labor, shipping, roof work, and lost production.
- microinverter vs string inverterMicroinverter vs String Inverter: How to Compare a QuoteThe better architecture depends on the roof and service plan, not a universal claim that one technology always produces more.
- solar battery costSolar Battery Cost: What a Home Storage System Adds in 2026A home battery can add as much to your project as a used car — so it belongs on its own line of the quote, not folded into one big number you can't take apart.
Owning and maintaining a system
- how long do solar panels lastHow Long Do Solar Panels Last? Lifespan, Degradation, and WarrantiesSolar panels rarely stop on a set date — they slowly make a little less power each year. Here's what "lasts" really means, and the warranty terms to check on your quote.
- do solar panels increase home valueDo Solar Panels Increase Home Value? Owned vs. LeasedBuying your solar outright can make a home more appealing to buyers — but a lease or PPA changes the picture at resale. The difference comes down to one word: ownership.
- solar panel maintenanceSolar Panel Maintenance and Cleaning Costs: What to ExpectRooftop solar has no moving parts, so upkeep is light — mostly occasional cleaning, keeping half an eye on output, and one likely inverter swap over the system's life.
Is solar right for the home?
- are solar panels worth itAre Solar Panels Worth It in 2026? A Decision FrameworkSolar can be worthwhile, but only when the household-specific inputs survive a written, apples-to-apples check.
- pros and cons of solar panelsPros and Cons of Solar Panels: What Changes the MathThe meaningful tradeoffs are financial and contractual as well as technical—and they vary by home.
Solar cost by state
EIA electricity-rate context by state plus a clearly labeled Berkeley Lab national historical installed-price screen.
Browse cost by state →Not sure if your quote is fair?
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