We had an 100% increase of power consumption last and this year.
It is mostly the night-tariff, which we now consume 27'000 kWh The day-tariff is only around 2'500 kWh.
First we thought this may be due to our new computers, but then the day tariff would need to be high too.
So the only reason could be the electrical heater and water boiler. Both of which are the same for at least the last 10 years, so it kinda doesn't make sense that it went up so much.
So my thought was, could it be that this year for example one rod in the electrical heater corroded which lead to higher resistance => More power draw?
Or do you have any other explanation?