Both La Terrasse and La Plage have generators . Been that way since the beginning. Also the Sonesta hotel. All in Maho.
Living in La Terrasse and experiencing the load shedding dozens of times, I can say that the generator kicks in about 15 seconds after the outage. When the outage is over, there is also another 15 second outage for the changeover.
A couple weeks ago, in the morning, I stepped into one of the three elevators at La Terrasse at the beginning of one of those outages. That is not the best feeling. Fortunately 30 seconds later I was on the move again..

Drphilsxm