So I put 2 ( in plumbing series) 20 gallon 12volt electric heaters. Each on separate breakers, separate electrical. The reason was limited space. And temporarily we just turn the breakers on/off when the batts are full. Works fine. But not a long term idea. I am running underground conduit now for low voltage from CC aux to probably a contactor or two to operate the heaters. Works fine unless I also turn on the table saw, and someone decides to shower, which kicks on the pump also. Then the 7000w of my stacked inverters overload and trip. So I guess a 3rd inverter might help. But surely there is a genius electronic way to supply power to #1, and when it reaches temp, to send power on to #2? So that I was only running one heater at a time?
Off grid, all solar, passive and active ( winter wood heat supplements) solar DHW, no backup.
Array 1-- 12 Sunpower 250, Outback FM 100
Array 2-- 12 Sunpower 250, Outback FM 100
Well array 780w, 6 Kyocera 130 w with Grundfos sqflex 11 and cu200 to elevated storage, ( 2- 330 g tanks,) no battery storage at well
8 24 volt Battle Born Lithiums
Outback FlexpowerTWO, VFX 3524a