Just a follow up. The customer took one look at the price of a gas fed 10kw generator and automatic transfer switch and has opted for a manual transfer switch and to purchase a tandem Honda generator set up.
The Servers are basically old PCs. I have put it on him to figure out if the UPS system will suffice. I've been told that even with those installed there will be a flash in the power supply. I'm not sure if that causes a problem for his PCs or not.
It seems he is on a rather tight budget, who isn't these days.
Thanks for all your thoughts!
