Posted: Sat Dec 31, 2022 3:39pm
If you have a 3.3 kw supply, the supply will trip out if you try to use much more.
If you replace the gas water heater with an electric one you would need to be careful & only buy a water heater of around 1.5 kw.
Or put the water heater on a time clock so that it does not come on when you are using a lot of electric when cooking etc.
If you have air con & use it frequently you are going to struggle on a 3.3 kw supply if you make the changes you are considering.
Your standing charge for the electric supply will double if you go for a 5kw supply.
Not a good idea if it is a holiday home with limited usage.
If you go for a 5 kw supply you will need a new main fuse & may have to have the property wiring checked out as it may not be able to cope with the higher capacity.
I would presume this would all have to be done by Iberdrola but not sure on this.
I have managed on a 3.3 kw supply for about 20 years.