Colmac HPA4 Heat Pump system for a 7 story building.
Five 120 gallon electric solar tanks for storage and backup heat
Two Rheem Hybrid heat pump water heaters reheat the recirculated water from the building.
The Colmac heat pump is a ''One Pass'' system that heats the water from cold (74 degrees) to hot (125 degrees) in one pass. It won't heat the recirculated hot water so the hybrids were added to do that.
PV panels replaced the previous solar water heating panels and provide power for the heat pumps and much of the other building loads. The WEL monitoring system provides information for fine tuning the 3 heat pump system.