If you've searched "should I get solar" in the last year, almost every result you clicked on was written or produced by someone who gets paid when you say yes. That's not a conspiracy theory — it's just how the information supply chain for residential solar is built. The installer's sales rep, the "comparison" site that generated the lead, the YouTuber reviewing panels, and even some of the review sites ranking installers all have a financial stake in your decision. Understanding exactly how each one gets paid tells you more about which advice to trust than any star rating does.
The sales rep: paid by the watt, not by your savings
Most residential solar sales reps work on a per-watt commission, typically $0.20 to $0.60 per watt of system capacity sold. A 10kW system at $0.30/watt nets the rep roughly $3,000 on that one deal. Notice what that number is tied to: system size, not your actual electricity usage, your roof's shading, or whether a smaller system would have covered your bill just as well. A rep has no structural incentive to talk you into a system 20% smaller than what you were quoted, even when that's the honest recommendation. Some companies add a minimum-size floor to commissions, which if anything increases pressure to hit a bigger number, not a right-sized one.
This doesn't mean every rep is dishonest — plenty size systems correctly. It means the incentive runs one direction, and you should assume the burden of catching an oversized quote is on you, not on the person who benefits from it being big.
The "unbiased" comparison sites: paid per lead, not per good match
Sites like EnergySage present themselves as neutral marketplaces where you submit one form and get several apples-to-apples quotes. Functionally, that's true — you do get standardized quotes, and it's genuinely more useful than calling five companies separately. But the business model underneath is a per-lead fee, typically in the $50–$150 range per lead, plus a percentage of closed contracts, paid by the installers who want to appear in front of you. That means the installers you see aren't the best in your area — they're the ones who paid for placement in that marketplace. A great local installer who doesn't participate in lead-gen platforms simply won't show up, no matter how good their work is.
This is a milder conflict than a straight commissioned sales call, but it's still a conflict. "Free to consumers" almost always means someone else is paying, and that someone else's payment is shaping what you see.
Review and ranking sites: the affiliate model, one layer removed
A lot of "top 10 solar companies" content is affiliate-driven: the site earns a fee when a reader clicks through and requests a quote, regardless of whether that company was actually the best fit. This produces a specific, predictable distortion — companies with big marketing budgets and aggressive affiliate programs rank higher than companies that simply do good, quieter work. It's rarely disclosed clearly enough for a reader to notice on a first pass. If a "review" site's rankings look suspiciously similar to which companies have the biggest national ad spend, that's not a coincidence.
When the conflict tips into fraud
The commission and affiliate incentives above are legal and disclosed (if you read the fine print). But they sit on a spectrum, and the aggressive end of that spectrum has produced real enforcement action. Power Home Solar, later rebranded Pink Energy, shut down in late 2022 amid an FTC lawsuit and multiple state attorneys general actions alleging deceptive sales practices and understated savings promises. The FTC and California jointly went after PACE lender Ygrene over financing practices that left homeowners with property liens they didn't understand, resulting in a $3 million settlement earmarked for lien relief. Vivint Solar (now part of Sunrun) settled with New Jersey for $122,000 in 2019 over deceptive sales tactics and had to change its practices. These aren't fringe cases — they're the same commission-driven incentive structure described above, just further along the same curve, where "oversell the savings" turned into "misrepresent the contract."
The common thread across nearly every FTC and state action against solar companies: overstated savings estimates, unclear or misrepresented financing terms, and high-pressure tactics that rushed homeowners past details they'd have caught if given time to actually read the contract.
What to read instead
None of this means solar is a bad idea or that you can't get honest information — it means you have to weight sources by who's paying whom. A few categories that don't have a financial stake in your specific decision:
Government and research sources. NREL (the DOE's National Renewable Energy Laboratory) and its PVWatts calculator produce production estimates with no installer relationship attached. The DOE's EERE consumer pages are dry but not selling anything. These won't hold your hand through a purchase decision, but the numbers aren't shaded in anyone's favor.
NABCEP-certified installer directories, used as a starting point for names — not as an endorsement of price or fit — since certification verifies training, not honesty.
Your own side-by-side math, not a marketplace's math. Get three to five written quotes directly, put them in one spreadsheet yourself (price per watt, equipment brand and warranty terms, financing APR, estimated production in kWh, not just dollars), and read the contract line by line before signing — including the cancellation window and what happens if the installer goes out of business mid-project. A rep or a marketplace summarizing this for you is doing work that's easy to do yourself in twenty minutes, and doing it yourself removes the one place bias can hide.
Local, nonprofit-run solar co-ops or energy offices, where they exist, often run bulk-purchase programs specifically because they're not commissioned per household — their leverage comes from group size, not from steering any one homeowner toward a bigger system.
The honest takeaway isn't "trust nothing." It's that every piece of solar advice you read, including this post, was written by someone with some relationship to the topic — ours is that we don't sell panels or take installer referral fees, which is a different bias than a lead-gen site's, not the absence of one. Ask who's getting paid before you ask what they recommend.