Comment by Lichtso

People often forget that architecture in (central and northern) Europe is build under the assumption that the climate has more cold extremes than hot extremes. Thus, buildings were constructed to both retain and collect as much heat as possible to save on heating in the winter. Now, if you just slap an AC onto that it will have to fight all of the passive heat collection. In other words, you would have to also close off all south facing and roof windows for it to work.

Furthermore, the way the last mile distribution of power works is often underground (with the cables directly in the sand, no hose or tube around it) which makes it expensive to upgrade to handle a much higher peak consumption. Only lucky thing is that you mostly need AC when the sun is shining, thus local production via photovoltaic cells is a good solution that sidesteps the power grid problem.