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Frequently asked questions

How accurate are your calculators?

They are planning estimates built from official data: EIA electricity prices, NREL PVWatts solar output, EnergySage installed-cost benchmarks and the utility and incentive rules we could verify. Your roof, utility plan and installer quote decide your real numbers. How we check our numbers.

I found a wrong or outdated number. What should I do?

Choose "Report a mistake" above and include the page and, if you can, a link to the official source. We check it, fix confirmed errors and update the date on the page.

My state is not covered yet. Can you add it?

Tell us which state. We add a state only after checking its incentives and utility rules against official sources. Until then, the lease vs buy calculator works with your own numbers.

Can you recommend an installer?

Not at the moment. Our guide to choosing a solar installer explains how to compare quotes and which questions to ask.

Is SolarNiverse free?

Yes. We may earn referral fees or commissions from partners, which never changes our numbers. How the site is funded.