Energy & Power tools
Energy calculators to plan and save, size solar and storage, plan generator backup, estimate home energy use, and weigh up EV and carbon figures. Each runs in your browser, privately and instantly.
Popular Energy & Power tools
-
Solar Panel Calculator
Size a solar array from your daily energy use, peak sun hours and panel wattage, get the kW needed, panel count and expected production. Calculates in your browser.
-
Solar Payback Calculator
Work out how long a solar system takes to pay for itself from its cost, incentives, production and electricity rate, plus lifetime savings and ROI. Calculates in your browser.
-
Battery Storage Calculator
Size a battery bank from daily energy use and days of autonomy, allowing for depth of discharge and round-trip efficiency. Gives kWh and amp-hours. Calculates in your browser.
-
Off-Grid Load Calculator
Add up your off-grid appliances to find daily energy use, peak power and peak current at your system voltage \u2014 to size your inverter, battery and solar. Calculates in your browser.
-
Generator Sizing Calculator
Size a backup generator from your running and starting watts, accounting for the largest motor surge plus a safety margin. Calculates in your browser.
-
UPS Runtime Calculator
Estimate how long a UPS will keep a load running from its battery voltage, amp-hours and inverter efficiency. Calculates in your browser.