Generator & Portable Power Station Calculator

Use this free portable power station calculator to work out exactly what you need to run your appliances. Whether you're asking how much power do I need for a site, a caravan, a home backup or a market stall, our generator size calculator UK tool adds up your running watts, surge watts, battery capacity in Wh and the recommended generator size in kVA. Tick the appliances you'll be running, set the quantity and daily hours, and see your results update instantly.