About SolarCalcPro
SolarCalcPro exists to answer one question honestly: do solar panels, a home battery, or an EV actually pay off for you? No signup walls, no surprise sales calls, and nothing you enter here goes anywhere unless you ask us to send it somewhere.
Who's Behind This
SolarCalcPro is built and run by Daniel Arendt — one person, not a company with a sales team. I got into this because most solar and EV sites either want your phone number before they show you a single number, or bury you in jargon that a normal homeowner gives up halfway through. I wanted something a person could actually use in five minutes and walk away understanding their own numbers.
Questions, corrections, or something looks wrong? Reach me directly at contact@solarcalcpro.com.
What This Site Does
Three independent calculators — Solar Savings, Battery Sizing, and EV Savings — plus Solar Panels by State, which takes you straight to your own state's numbers. Every one of them runs on the same underlying calculation engine, so a number you see in a calculator, on your state's page, or in a comparison table can never quietly contradict another number elsewhere on the site.
Where Our Numbers Come From
We don't estimate or guess. Electricity rates come from the U.S. Energy Information Administration (EIA), sun-hour and solar-resource data from the National Solar Radiation Database, and state incentive rules are cross-checked against DSIRE and official IRS and Department of Energy guidance.
When a law changes — a tax credit expiring, a net-metering policy shifting — we update the affected numbers site-wide the same way, rather than leaving old figures live because a rewrite is inconvenient. If solar turns out to be a weak deal in your specific state, our pages say so plainly instead of talking around it.
Your Results, No Strings Attached
Every calculator lets you download your full results as a PDF report — no email address required, no account, no "we'll send it to your inbox" trick. Run the numbers, get your report, done.
If you'd like your results emailed to you, or want the occasional update when incentives or rates change in your state, you can leave an email address. That's always your call — never a condition for using anything here.
How This Site Stays Free
Keeping the site, the data, and the calculators running costs money, so SolarCalcPro earns through clearly marked partner links, and by connecting homeowners with installers — but only the ones who ask to be connected.
Two things stay true regardless: no partner can change a single number our calculators show you, and your details only ever go somewhere if you actively ask us to send them. Run the numbers, take the PDF, walk away — that's a completely normal way to use this site, and it always will be.
Start Here
New to solar? Start with Solar Basics, check your own state on Solar Panels by State, then run your numbers in the Solar Savings Calculator. Curious about storage or going electric? Battery Basics and EV Basics cover the fundamentals.
Content on this site is reviewed against primary sources: EIA, NSRDB, DSIRE, IRS, and the Department of Energy.