In general, you should avoid peak loads in your system as far as possible, not only for reasons of cost, but also for reasons of safety and longevity of the systems. A peak load always occurs when too many consumers are employed or run in parallel with each other. Your supplier has special contracts for systems above 200KW/h, which regulate exactly which base loads you are allowed to run permanently in order not to overload the network too much. In the event of a peak load between 3 and 4 times a month, if you exceed your agreed base load of e.g. 200KW/h for just 15 minutes, your energy supplier can and will not only put you in a higher classification, which means that your energy price increases , but there can also be costs of up to €100 per KW/h for the KW/h consumed in the short time. Apart from that, these peaks are not planned by the energy supplier. If the load is too high, the network can collapse so much in the short term that the voltage collapses in certain areas, which would also be a disaster for your system.