Hi, I'm a new member. Came across this forum by chance and it seems to be a very interesting forum indeed. I own a small holiday flat in a building that has a 3 phase Stiebel Eltron instant hot water heater. Works well enough. Except during load shedding. My guests complain about not being able to shower when there's load shedding. I'm thinking about installing an 8kwh inverter/battery system and replacing the Stiebel Eltron heater with an Ariston 30L oversink heater (single phase and 1500w consumption). I'm not at all technically minded – this has been suggested to me – but I'd like to hear from anyone with experience and/or expertise. Would appreciate any constructive input. Patrick