I am getting close to being able to redesign my hot water system completely, and I am looking at electric tankless heaters to go along with a solar preheat system. I don't have gas at the house, so I'm treating that as not an option. I also would like a unit that will heat to at least 130, preferably 140. I figure if the faucet says "hot", it ought to produce hot water, damn it
I do have 200 amp service, and I seem to have arrived at < 100 amp unit. I plan to install a sub panel for the water heating system, so breakers and cabling and such are not an issue for me.
I am concerned about a couple things, and I am having trouble with some of the specifics of the various electric tankless units that are on the market.
I've seen some references to lights dimming sporadically and output temperature fluctuating. Does anybody know how these silly things work? Are they only able to turn individual elements on or off? That seems absurd.
Does anybody have experience with American Heat? In particular, the "Ultimate" whole house model...