Which solar installer is best?

There's no single best installer — the right one depends on your roof, state incentives, and what local companies actually serve your zip code. Instead of chasing a national ranking, compare 3-4 quotes side by side on cost per watt, equipment brand, workmanship warranty length, and reviews under the company's exact legal name.

How many solar quotes should I get before choosing an installer?

Get at least 3, ideally 4. Homeowners who compare multiple quotes typically save thousands of dollars versus accepting the first offer, because installers price more aggressively when they know you're shopping around. A marketplace like EnergySage can surface several vetted quotes at once instead of contacting installers one by one.

What's the most important number to compare across solar quotes?

Cost per watt (total system price divided by system size in watts) is the single most useful apples-to-apples comparison, because it strips out differences in system size. Beyond price, also compare the specific panel and inverter models named, the workmanship warranty length, and estimated annual production in kWh — not just the dollar figure.

Should I choose the cheapest solar quote?

Not automatically. An unusually low quote often means lower-tier equipment, a shorter workmanship warranty, or a company cutting corners on permitting and inspection. Compare cost per watt alongside equipment quality and warranty terms — the cheapest quote on paper isn't the best deal if it underperforms or the installer isn't around for warranty service.

What questions should I ask before comparing solar quotes?

Ask each installer: what panel and inverter brand/model are specified, how long is the workmanship warranty and who backs it, is the crew in-house or subcontracted, what's the estimated annual production in kWh, and what happens if you need a panel upgrade. Getting the same answers from every installer is what makes the quotes genuinely comparable.

How long does it take to compare solar quotes properly?

Budget about 30 minutes per quote once you know what to look for — checking cost per watt, equipment specs, warranty terms, and production estimates. Comparing 3-4 quotes properly takes an afternoon, which is a small time investment relative to a system you'll own for 25+ years.

How to Compare Solar Quotes: 8 Things to Check Before You Sign

Most homeowners get two or three solar quotes and pick the cheapest one. That's usually the wrong move — and it can cost thousands of dollars or leave you with a system that underperforms for 25 years.

Here's the truth: solar quotes are designed to be confusing. Different installers use different metrics, different financing structures, and different ways of presenting savings. Comparing them apples-to-apples takes about 30 minutes if you know what to look for.

This guide walks you through exactly what to check, what questions to ask, and which numbers actually matter.

Step 1: Get at Least 3–5 Quotes (Seriously)

Before you can compare quotes, you need enough of them. The solar market is competitive, and pricing varies significantly between installers — sometimes by $5,000 to $10,000 on the same size system.

The most efficient way to do this is through EnergySage, a free marketplace that lets you collect and compare multiple installer quotes side-by-side in a standardized format. This eliminates the biggest problem with comparison shopping: each company presenting numbers differently.

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For homeowners who want portable backup power in addition to (or instead of) a fixed home battery, the Jackery Explorer 2000 Plus is worth considering — it can be expanded up to 12 kWh with add-on packs and supports solar charging, making it useful both as emergency backup and for outdoor or off-grid use.

What a Good Quote Looks Like

A well-structured solar proposal should include:

System size in kW (DC)
Number and model of panels — not just "high-efficiency panels"
Inverter model — not just "string inverter"
First-year production estimate in kWh with methodology noted
25-year production and savings projection
Itemized costs — not just a final number
Financing options with clear APR and total cost disclosed
Warranty summary — product, performance, and workmanship separately

If any of these are missing, ask for them. A professional installer will provide all of it without hesitation. If they push back on itemized costs or won't explain their production estimate methodology, that's a red flag.

Quick Reference: Solar Quote Red Flags

No itemized costs — just a lump sum
Production estimates with no software or methodology cited
Loan quote that doesn't disclose the dealer fee
Installer can't tell you who holds the workmanship warranty if they go under
High-pressure "this price expires today" tactics
Panels or inverters from brands you can't find online
Projected savings that are dramatically higher than every other quote

Bottom Line

Comparing solar quotes properly takes an hour of your time and can save you $3,000–$10,000 while ensuring you get a system that actually performs as promised. Normalize to cost per watt, verify the production estimate methodology, understand your financing structure, and vet the installer — not just the price.

Start by getting at least 3 quotes. If you want the fastest path to a fair, competitive set of bids, EnergySage is the most efficient tool available.

Last updated: 2026-03-24

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EnergySage pre-vets local installers so you don't have to start from scratch. Compare quotes in a standardized format, ask questions anonymously, and buy on your schedule — no pressure.

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