Someone else mentioned they might need the school as a public shelter. Which makes sense.
The one time there was a daytime power cut, during church services, they cancelled and sent everyone home. We had a baptism scheduled that evening. But, only cold water with the power out. That got delayed.
Christopher A. Young Learn more about Jesus
WHAT does a school HAVE to power,that would justify the cost of a backup generator and fuel supply? maybe the food in the kitchen's freezer/refrigerator? doubtful.
If power goes out,they just send the kids home. that's what happened to me back in the 1960's,in junior high.