The immersion heater heats the water.
Carruthers, our system doesn't work that way.
We run a fridge freezer so when calculating what we can use on the boat this has to be taken into consideration.
If I'm buying something it must be under a kilowatt.
A quick wander around any electrical store will soon show you that many kettles, toasters and hair dryers are out of this range along with many other appliances.
I could run a slow cooker but there is no point as anything that needs long slow cooking sits on top of the fire.
We don't have an electric kettle, toaster or iron, my only kitchen appliance is a stick blender.
If I'm heating water for a shower or washing up I can't run the vacuum. If the washing machine is on I can't have a heater running. I can run one thing at a time, not all at once.