First, you need to evaluate what is the highest power rated appliance you want to run, this could typically be a hairdryer or it may be a microwave. You need to make sure the inverter can cope with the peak power requirements of that appliance while factoring in efficiency losses. Some inverters come with a couple of 230V 3 pins sockets, but you're not going to be able to run a hairdryer and a microwave at the same time without a pretty huge inverter and multiple leisure batteries. But the answer to this question is generally yes. Its generally better to buy an oversized inverter if you can afford it to cover the use of a variety of devices.