Depending on the parameters of the heated building and the domestic hot water source, the required power connection may vary. Of course, one must also consider the electrical appliances already in use in the household. For example, a house may need a heat source with a power of 12kW. In addition to that, there are household appliances (washing machine, dishwasher, induction hob, etc.). Naturally, all devices usually do not operate simultaneously; however, an optimal power allocation in this case is 18-20kW.