[T77911S]

frequency only matters with make before break transfer switches and those are going to be more expensive.

I like the device in the 3rd post,. cheap, safe and effective.

the one you listed from HD is pretty nice too.

as far as knowing when power comes back on the one from HD should automatically transfer back.

if you run 240v you have to think about load balance.
unless you need 240 I would run 120.
either way I would figure out what you want to power and move them around in your panel to either balance the load or run everything off of 120.


BTW, I live in SC, so we have hurricanes. this last one was the first that I have had power out for any length of time, about a week. it really was not too bad, no hot water only last day or so. 80gal tank kept it warm and we used it sparingly.
still not worth getting an EG. you have to run them enough to keep the carbs from gumming up.
I do have one know ONLY because it was free.