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Inverters, loads & power calculators

Add up what your appliances use, then size the inverter, generator or hook-up supply to match. Includes a full 12 V energy audit for vans and RVs.

12 V power consumption calculatorAdd up your appliances to find daily Wh and Ah for a van, RV or boat.Inverter size calculatorContinuous and surge rating for your appliances, plus DC current.Inverter current draw calculatorHow many amps an inverter pulls from your battery, plus fuse size.Portable power station run time calculatorHow long a power station will run your devices, and recharge time.Generator size calculatorGenerator watts and kVA for your running and starting loads.Hook-up and shore power calculatorWhat you can run on a campsite EHU or 30A/50A RV pedestal.Electricity cost calculatorDaily, monthly and yearly running cost of any appliance.12 V fridge power consumption calculatorDaily Ah of a compressor fridge, how long the battery lasts, and solar needed.CPAP battery calculatorHow many nights a battery or power station will run a CPAP machine.Generator fuel consumption calculatorFuel per hour and run time per tank for petrol, diesel or propane generators.

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