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 sales calls, and your results never turn into a lead that gets sold to installers without you choosing that yourself.
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 are either cluttered with ads and lead-gen forms, or so dense with 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.
Down the line we may add an optional way to leave your email — for a newsletter or occasional update — but it will always be a choice you make, never a condition for using the site.
How This Site Stays Free
Running the site, the data pipeline, and the calculators isn't free on my end, so at some point SolarCalcPro will likely carry clearly labeled affiliate links or let you opt in to hearing from an installer directly. When that happens, two things stay true: it will never change a single number our calculators show you, and your information only ever gets shared if you actively choose to share it. Nothing here is designed to extract your contact details before showing you value.
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.