Island-wide?

Isn’t French-side power provided by EDF, or has something changed from decades ago when I used to get an invoice from them?

I never see notices that EDF has an outage.

As to generators, maintenance isn’t that hard. Annual or semi-annual oil changes and air filter replacements are easy, and so are fuel filter replacements, Anything beyond that likely requires a field technician with a laptop. In a normal world, backup generators run for only a few dozen hours each year, and much of that is monthly testing. In a GEBE world, who knows.

Still, generator failures happen, and that’s when you call in a factory-trained tech who has factory software on their laptop, and expect to pay big bucks if they come from off-island.