I have an electril 50-litre water heater (boiler) in an appartement that's going to be abandoned probably for several months. I thought about switching off the boiler's electric fuse to switch off the boiler and save money, since nobody is going to need the hot water.
Can I simply switch it off, and back on in several months, or should I do something more? Or I shouldn't do it at all?
A photo of the (I think) crucial parts of the boiler is attached: