When we arrived at the apartment and switched the electricity back on, we found ALL the apartment’s lights on, as such as all the AC units and the washing machine. It seemed pretty normal to me that, when you tried to use also the shower, the power went out. We provided the apartment with more watts than the normal amount, because we know that it needs more power to let everything works properly. By the way, there is a limit of course. If you had just given us the chance to help you, we would have been able to fix the problem immediately.