Your roof is an asset. Find out what it earns.
Free residential solar design and analysis calculator. Get accurate design and performance estimates for your address.
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Built on Google Solar imagery and PVWatts® modeling, the same data installers use. Works for most US urban and suburban addresses. Nothing is saved without your consent.
Most free tools scale a national average by your bill. This one models your building in 3-D, places panels on real roof planes, and simulates production hour by hour. Then it compares cash, loan, lease and PPA over 25 years.
It also shows what the leasing company makes on your roof. We have not found another free tool that does.
We're introducing a better, privacy-first way to go solar.
Solar companies pay agencies a fortune for weak leads, then recoup it from the rare homeowner who buys. That's you.
We do the reverse. We run local installers through an eight-step vetting process (learn more) to find you one that's licensed, insured and certified, uses its own crews rather than subcontractors, has no disciplinary history or predatory financing, and will still be around in ten years to honor the warranty. All at no cost to you, and no obligation.
You decide, on your terms. Put your address in the free calculator and see for yourself. If it looks like a good investment, tell us and we'll introduce you to the one installer worth talking to.
We pay you up to $500 from the referral fee that installer pays us.
Paste a quote. It pulls out the price, size, financing and the escalator buried on page eleven, then checks them against an independent model of the same roof. Built by a former renewable energy research scientist.
We are not selling you the system, so we have no reason to flatter the quote.
Paste the pricing and equipment lines from an email, a PDF or a forum post — messy is fine. We read it, show you what we found, and change nothing until you say so. How this works ↗
The text you paste is sent to our reading service to be interpreted, then discarded — it is never saved. Remove your name and address first if you'd rather.
Your solar snapshot
Ways to pay — and what each could save you
Estimated with standard assumptions for this location and system. These four financing paths are the same ones full members can fine-tune input by input.
Crunching the numbers…
Informational estimate, not an installation quote. “25-yr savings” is cumulative and net of what you pay (purchase, loan, lease, or PPA). Battery storage is not included in this snapshot. See the full methodology.
Get your full analysis — free
Adjust every assumption, add battery storage, compare net-metering and time-of-use
scenarios, see hourly production & battery dispatch, audit the lease/PPA fund math,
and export a complete proposal. Create a free account and it's all yours — plus up to
3 saved projects you can reopen on any device.
No phone number, and nobody contacts you. Installer
matching is coming later, and only ever happens if you explicitly ask for it.
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Planning to move?
Few people stay put for 25 years, and leaving early is where these deals differ most. If you sold in year we will show where you would stand.