Electric and propane water heater in series?

[toms]

Thank you for your reply.

Are you totally off grid?

How much battery Cells capacity do you have?

How big Is your Maxwell Supercap? Is it connected directly in parallel to your battery Cells?

Do you use the 4 kW backup heating element of the Heat Pump
or only use the heat pump econo mode (and the Rinnai Infinity on demand propane HWS when needed) ?

We are totally off-grid.

The battery on that inverter is 200ah / 48V. It is a secondary system used for inductive loads and excess solar.

The supercap is 64V 125F

I don’t use the resistive element in the HWS very often, just the heat pump section which then feeds the LPG on demand system.