Inverter Calculator | Sizing AC Load in an Electrical System | RVs & Vans

This inverter calculator will help you correctly size your inverter for the daily load of your AC appliances in your camper.

This calculator forms part of our camper solar setup series and the wider subject of campervan electrics. 

How do I use this inverter calculator?

Enter every electrical AC device and component you’ll use in your camper.

Enter the watts each device uses.

Do I need an inverter?

No! If you only use DC appliances, you don’t need an inverter.

You only need an inverter if you want to use AC appliances powered by your deep cycle battery.

How do I know all the electrical devices I’ll use?

You’ll need a complete list of all AC and DC appliances to work out the total solar battery bank.

I won’t use all my devices every day. What should I enter in the calculator?

The aim of the calculation is to size the inverter so it can handle the AC devices you will run.

How do I know if my appliance is AC or DC?

The labels or specifications of most appliances state whether it is AC or DC.

Get this right for your camper lifestyle and you can complete your DIY campervan conversion with confidence. Swipe up to learn more!