Yeah. Think that's always going to be an issue (customer's houses). I did consider fitting a split charge system (similar to the one on my camper) which powered a 12V heater for when I'm between jobs.
Although if everything's 13A and is only connected for a short time is it 'really' an issue? Isn't the worst that can happen it trips their CU?
Although if everything's 13A and is only connected for a short time is it 'really' an issue? Isn't the worst that can happen it trips their CU?