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Sorry, only just saw this.
#1. What size transfer Switch for each one? It has to be enough to allow power to your house under normal circumstances. If you have 125A service, you need a 150A or larger TS.
A 200A Transfer switch is about $1K new. You can order Generac TS through Home Depot.
The First deal sounds pretty good, but I would question the owner to the number of times the oil and filter were changed. It should be about every 100 hours. The other Generator with 140 hours, again ask about the maintenance.
You should stick with a transfer switch from the same company or manufacturer since some "talk" between the generator and the TS. We used to sell Briggs & Stratton. Each one "starts" the generator in a slightly different way.
That said, all of the generators are comparable. I like the Kohler for the way the generator starts. But we could accommodate any system with our Control System,
$2K for a 11kW Generator is a decent deal. The hours are OK if it were taken care of properly. $1.9K for a used 11kW with 140 without the TS seems a little bit high, but in the ball park..
__________________
James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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