This is an 18KW Generac Quietsource Series home generator plumbed for Gas (not Propane) that I bought a couple years ago to put on my house, but ended up moviing and never got around to using it. Is wifi compatible I'm told and comes with the Generac Nexus Controler and the the transfer switch they took off the home when I bought it. Since my son now has it in storage at his home (under a roof always), he wants me to move it and I can no longer use it and want to sell. Have 3+ invested but would let it go for 2250.00 or a reasonable offer (if I can't sell it for a reasonable price I'll just donate it and write it off). So if anyone out there is looking for a great deal on a home generator and doesn't want to pay an arm and a leg here it is!!! Gerenac tells me it can be converted to propane, but right now its natural gas as noted above.