Bob,
All lathes but one are manual. The mills are manual as well. Two of the welders are automated.

My back up works great on black outs (manual reset), but the brown outs have taken out my back up twice in the last 3 years. It takes a greater toll on the computer balancer, and the CNC.
If you see black outs, you most likely know what its like to have 8 guys standing around until I can be sure the power is back up. I purchased the back up to save me on failed electronics, and have spent 6,000 in repairs on it alone. Perhaps I need a back up power supply, for my back up power.....

I start my guys at 4 am and close by 2:30 to avoid the power overloads the summer brings.