How many modules do I need?

You need one module per distribution board that you want to bill separately, regardless of how many of the four groups that board contains. One holiday home with one distribution board thus means one module, three homes with three distribution boards mean three modules. This works well for separating consumption per property or object, but not for individual rooms within one home on the same distribution board. With very many small distribution boards with few groups, it is wise to first calculate whether the investment per module will pay for itself.