Most solar sites ask the prospect to trust you before you've given them a reason to. A headline, a stock photo, a "get a free quote" button. The prospect has no idea what a system would cost, how long it takes to pay back, or whether it makes sense for their house at all. So they leave.
SolarCalculator flips that dynamic.
Built on NREL PVWatts® methodology — the same federal standard used by professional solar engineers — it runs a real financial model in the browser, in real time, before the prospect ever fills out a form. System size, panel count, annual output, gross cost, 30% federal ITC, net investment, 25-year savings projection, payback period, CO₂ offset. Every number recalculates instantly as they adjust their monthly bill, utility rate, region, roof orientation, and shading.
By the time they hit the CTA, they're not wondering if solar makes sense. They already know.
One component. Drop it onto any page, connect your CTA links, customize everything from the property panel. No code required on your end.
Fully responsive. Keyboard accessible. Wcag compliant.
I build websites for solar installers. That's my work.
And every time I needed a calculator that actually ran the numbers — not a fake slider with made-up savings, but a real model an installer could put their name behind — I couldn't find one. Not on the Marketplace, not anywhere.
So I built the one I always wished existed. Real NREL methodology. Customizable enough to drop into any brand without touching code. Everything I needed, in one component.
If you're in the same position I was — building for solar, hitting the same wall — this is the shortcut I never had. You don't have to build it. It's already done.
Most solar sites ask the prospect to trust you before you've given them a reason to. A headline, a stock photo, a "get a free quote" button. The prospect has no idea what a system would cost, how long it takes to pay back, or whether it makes sense for their house at all. So they leave.
SolarCalculator flips that dynamic.
Built on NREL PVWatts® methodology — the same federal standard used by professional solar engineers — it runs a real financial model in the browser, in real time, before the prospect ever fills out a form. System size, panel count, annual output, gross cost, 30% federal ITC, net investment, 25-year savings projection, payback period, CO₂ offset. Every number recalculates instantly as they adjust their monthly bill, utility rate, region, roof orientation, and shading.
By the time they hit the CTA, they're not wondering if solar makes sense. They already know.
One component. Drop it onto any page, connect your CTA links, customize everything from the property panel. No code required on your end.
Fully responsive. Keyboard accessible. Wcag compliant.
I build websites for solar installers. That's my work.
And every time I needed a calculator that actually ran the numbers — not a fake slider with made-up savings, but a real model an installer could put their name behind — I couldn't find one. Not on the Marketplace, not anywhere.
So I built the one I always wished existed. Real NREL methodology. Customizable enough to drop into any brand without touching code. Everything I needed, in one component.
If you're in the same position I was — building for solar, hitting the same wall — this is the shortcut I never had. You don't have to build it. It's already done.
Alessandro
