Direct electric heating typically runs on 240 V, but at least in Northern Europe (Finland, Sweden) electric heating is often a central heating via hot water cir

Direct electric heating typically runs on 240 V, but at least in Northern Europe (Finland, Sweden) electric heating is often a central heating via hot water circulation. Here it used to be common that there's a rather large water tank (1 cubic meter or even more) that is heated up during night time when electricity was cheaper, and then gives out the warmth during day. This is no longer a feasible use case because night time usage of electricity has gone up and night electricity is not cheaper. Heat pumps (operating with drilled wells going 100 m deep) have become more common. The pumps take 400V 3-phase.