tankless HW - Takagi Jr is the way to go. I have been using one for 8 years - no issues.
Generator, get a variable speed that idles, otherwise the constant hi rpm will drive you nuts.
Thanks for the advice on the Takagi, Jr., I will certainly look into it. Is there anything else that you’ve done to get past the cutoff issue, like a small reserve tank ahead of the unit? Why does this model not have the issue that most of the others appear to have?
Regarding the generator, I’d love a quiet one. That old Onan’s a beast. But, it does work and it works well. Replacement is another big chunk of change. It’s been rebuilt so should be good for a while yet.
rennai is good also for tankless water heaters