All the A/C units are what's driving the high power requirements. Most whole house backup gens are in the 22-24K range. For that difference in price I'd go for the 32K unit, it's always better to have more than too little.
While I surely agree that more is better than less, i highly doubt that a 32K or even a 24K is need in most houses. Unless the house is more than 5000 sq ft with very high demand AC or other specific high demand item.
I'd have 2 different Generac contractors survey mine & quote.
I have a 2400 sq ft house, AC, 2-electric ovens w/gas burners, a well pump & a sump pump, 2 fridges & a freezer & an electric dryer & both sized it at 16KW.
I run a 10K portable now, wired in via a transfer switch & it will run the entire house just fine under normal conditions.................probably won't with the ovens, the AC & the well pump all running at the same time but the 16KW surely will.
MM
