When we bought the kennel 21 years ago I promptly bought a 10000 watt portable from PA. It was important to have heat and water for the kennel in the event of an extended outage. Worked great. Kept it in the shop and had a small manual transfer switch. Never had a problem with it.
When we switched the kennel heat over to geothermal we needed to upgrade the genset to something bigger. If both heat pumps kicked in at the same time they pulled over 150 amps at startup.
On the recommendation of the local electrician I bought a 36 kw Generac running on propane with an automatic transfer switch.
It has been the biggest piece of crap I have ever owned. I had 7 service calls before it ever produced a usable watt of power. In the first year they replaced the coil packs, cam sensor, crank sensor, 2 control panels and finally the entire wiring harness before it would run reliably.
Warrantee expired after a year. The local Generac service company lost it's tech and never replaced him. For service I had to get someone out of Winnipeg, 5 hours away and of course he was on the clock from the minute the truck started so it would cost about 900 bucks before he got here. Only did that once to replace the transfer switch which had literally exploded. Ended up with a Saskatoon service tech who was closer but always too busy to make the trip. Generac had service guys in Regina, 25 minutes away but they only worked on the small portables, not the bigger stationarys. Local Caterpillar dealer sent a guy out once to replace another crank sensor. He ended up making 3 trips to get it running and when it died again 2 weeks later they said no thanks, we'll pass, you're own your own. Currently I am on my third transfer switch.
There is a Regina tech that will come out now which helps, sort of. He will only replace parts with genuine Generac parts. The starter failed last year and the Generac quoted price was around 2 grand. Got it rebuilt locally for a hundred.
This winter the power went out twice and both times the generator wouldn't start because it had to be installed outside and with the winter storms we got this year the enclosure would pack absolutely full with snow. I'm going to put a garden shed around the damn thing this year. Probably still won't start when the power goes out but at least I won't have to look at it.
I get worked up just thinking about this piece of crap.
They only thing worse than having your power go out on a minus 30 day is also having a generator that won't work when the power goes out.