Free Solar & Energy Calculator Widgets
Solar payback, system output, battery bank, inverter, generator size, generator fuel and panel tilt widgets for installers and off-grid guides - every assumption visible.
Try them live
Real solar & energy widgets - exactly what your visitors would see.
The live example loads when it scrolls into view.
Who these are for
Solar installers, energy consultants, off-grid and RV communities and generator dealers.
Common uses
- A payback estimate on a solar installer's quote page
- Battery and inverter sizing in an off-grid build guide
- A generator sizing check on a dealer's product page
How embedding works
Pick a widget, set the theme and size, copy one line of HTML and paste it into your page. It runs in its own frame, so it cannot clash with your site's styles, and it resizes itself if you use the loader.
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Payback year, lifetime net savings and ROI of a solar system, with tariff rises and panel degradation.
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Daily, monthly and annual kWh and specific yield of a solar array from kWp, sun hours and performance ratio.
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Battery bank kWh and Ah for days of autonomy, depth of discharge and system voltage, with battery count.
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Inverter VA rating from a list of appliances, their surge factors, power factor and headroom.
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Generator kW and kVA from running watts and the largest motor's starting surge.
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Fuel per hour, runtime per tank and running cost of a diesel, petrol, LPG or gas generator.
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Best fixed tilt and facing direction for solar panels at any latitude, with seasonal angles.
No widget matches that search.
Other widget categories
- All calculators
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- Design
- QR & Generators
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- Networking & IT
- Business & Contact
- Announcements & Notices
- Page Components
How to add a widget
Open a widget, choose the theme, width and style, check the live preview, then copy the code. Paste it into an HTML or "Custom code" block on your site - step-by-step instructions for each platform.