"So it's a UPS to keep power on till the Diesel kicks in then?"
Probably something like that. 30 minutes may look not so much, but this could do wonders to smooth that pesky surges, that are short lived and very intense.
Things like everybody turning the kettle on, ate the game brake. This type of thing could very well negate the need to fire up a natural gas generator for 15 minutes.
Biting the hand that feeds IT
