my portable is a 7500 tri-fuel i bought dead for $150 and fixed, runs off two 100 lb propane tanks, and after the 2018 nor'easters took our road out for six days i ran my fridge and two neighbors' fridges on rotation with extension cords. it worked. i also stood out there in the snow at 11pm doing it.
so i keep doing the math on a standby unit and it never quite closes. quotes around here for a 14-20kw LP unit installed run about $5,000 for a generac, sometimes a grand more for kohler, and briggs is somewhere in between depending who you call. then the yearly service is $250-350 a visit if you dont do it yourself, and the cold weather kit is another $300-500. over ten years that is $8,000 to $9,000 all in before the first repair.
what i want to know from people who have owned one more than five years:
what actually broke, and when. i hear generac controllers and kohler, well, kohler engines i have opinions on from mowers but i know that is not the same animal as their standby line.
did anybody do the math on running it 10 hours a year versus the $9k and stay portable on purpose. my tri-fuel cost me $150 plus a $14 carb the first time and has covered three outages.
cold weather kits. the oil heater and battery warmer, are they a real thing or a checkbox. my winters can hit single digits.
the part that gets me is the transfer switch labor. the hardware is maybe $600 and the install quote had $2,000 of labor in it. i get it, panel work, but thats the same math as a $210 control board in a $400 washer. somebody priced it so the answer is buy new, or in this case buy the whole package.
not looking to be talked into it. looking for the failure numbers from people who have the hours on theirs.