[captnron]

I am looking for the best 20KW or 27KW standby generator that will run on LP. Does anyone have any experience with Cummins, Baldor, Kohler, Generac, or any other top notch generator?

 

[kbsparky]

SIngle phase, or 3 phase?

Look for one that operates at 1800 RPM. That is one indication of a good unit.

 

[junkcollector]

I agree with KBsparky.

I would avoid generac or rebrands like the plague- They are loud, run at 3600 RPM, and break down a lot. Finding parts can be difficult as well.

 

[VA master elect]

The Generac Quietsource series (liquid-cooled run at 1800 rpm if i'm not mistaken. Check Generac.com website.
I've personally installed over 200 whole house Generacs from 7 kw to 40 KW over the last 12 years.