Free · No sign-up · No API key

Embed our free solar calculator on your website

Give your visitors a working solar sizing tool without building one. Paste one code into your page and they can work out their inverter size, panel count, battery bank, system cost and payback period right on your site.

Adjusts to each visitor

Currency, sun hours and starting electricity prices are set for the visitor's country, using PVGIS solar data and official price sources.

49 appliances built in

Running watts, start-up surge and daily energy for common home loads, from fridges and ACs to well pumps and EV chargers.

Light on your page

The frame loads lazily, only when a visitor scrolls near it, so it doesn't slow down the top of your page.

Get the embed code

Pick your options, copy the code and paste it into your page's HTML.

Theme

Auto follows each visitor's light or dark setting.

Starting height (pixels)

Used until auto-resize runs, or always if your site removes scripts.

Auto-resize the height to fit the calculator (adds a short script) Add rel="nofollow" to the credit link (only if your site's link policy needs it)

Your code

Live preview

This is exactly what your visitors will see, with the options above.

Solar calculator by SmartSolarSizer

Where to paste it

WordPress: add a Custom HTML block in the page editor and paste the code. Some WordPress.com plans remove scripts; the calculator still works at the starting height.
Wix: Add → Embed code → Embed HTML, choose Code, paste, then drag the box to the height you want.
Squarespace: add a Code block, set it to HTML and paste.
Webflow: drag in an Embed element and paste.
Blogger: switch the post to HTML view and paste where you want the calculator.
Plain HTML: paste it anywhere inside <body>.

Terms of use

The embed is free for personal and commercial sites, including installers, retailers and blogs.
Please keep the "Solar calculator by SmartSolarSizer" line visible under the calculator. You may add rel="nofollow" to it.
Don't cover, crop or restyle the calculator to hide where it comes from, and don't present its results as a quote from your company.
Results are planning estimates, as described in our Terms of Service. We may improve the calculator at any time; your embed updates automatically.

Questions

Does it collect my visitors' data?

The calculations run in the visitor's browser and nothing they type is stored by us. The frame uses Google Analytics in the same way as our own site, as explained in our Privacy Policy. If your site shows a cookie notice, mention embedded third-party tools there.

Does it work on phones?

Yes. The layout stacks into one column on small screens. With auto-resize on, the frame grows to fit, so visitors don't scroll inside a box.

Can I change the colours?

You can choose light, dark or automatic. If you need something else, tell us what your site needs.

Can visitors share or save their results?

Yes. The copy-link button creates a link to their exact results, and the PDF button downloads a report. Both work inside the frame.