27 KW is plenty big for most homes. Had one installed on a 10,000 sf house last year and it powers the bulk of what’s important. But I did have a client request a 32 KW for a 5,000 sf house I built for him… it powers nearly everything. For $2,000 I’d say go bigger! And for anyone outside of the lowlands reading this, a generator loses 3% output for every 600’ of elevation gain so there is that to consider… almost everything I build is above 4,800’.
