Inverters are used to obtain a 240V AC supply from a 12V or 24V DC source - basically so that you can use equipment designed for use at home while you are out on the road.
Very popular for both trucks and caravans - but there are also many other uses.
You must ensure when choosing a model that it is large enough to run the appliance. Check on the appliance how many Watts it requires, and then preferably double it to be sure!
Higher power models up to 2000W are available to order.