> operating few hundred hours per year

Do you really have a few hundred hours of power outage per year?

Around here, the power is so stable that we go multiple years without an outage that lasts longer than a few seconds.

If I installed a generator it wouldn’t a couple hundred hours per year. It wouldn’t run at all for years at a time unless I manually exercised it as yet another maintenance task for my already too long list of things to maintain.