27kW is 225A, it’s what you want for fully backing up a 200A utility service, which is what all new construction has in my area, tho some older homes still have 100A services.
Interesting, most residential homes in The Netherlands do go beyond 40A for 1 phase and 35A for a 3 phase setup. Granted. We don’t regularly run airconditioning either and most heating is on NG, but still…