I have a 3 ton WF series 7 with Intellistart. I am looking to get a portable generator that can run the geo. The house has a 30 amp transfer switch. I borrowed a Westinghouse generator (7500 continuous, 9500 peak) and tried that out. It would try to start up the geo but before long I got an E8 error (voltage over/under shutdown). I didn't know if that is a result of the generator not producing clean enough power or being underpowered. Westinghouse is a generator brand I had not heard of before so I don't know the quality of that generator vs more familiar brands like Generac or Champion. I was wondering if people had any recommendations of generator brand and size to get. Thanks in advance for any advice!