963 Discover the four use cases: Use Case 1: PV self-consumption for Daikin Altherma Use Case 2: PV self-consumption for Multi+ Use Case 3: Modbus RTU/IP for Daikin Altherma Use Case 4: Modbus RTU/IP for Daikin air-to-air heat pumps This use case provides Smart Grid readiness to our air-to-air heat pump range, through Modbus RTU/IP. This use case shows similarity with use case 1 for Daikin Altherma. However, once the injection is higher than 1.2 kW, the excess of energy is in this case directly supplied to the booster heater of the domestic hot water tank. This will accelerate the generation of domestic hot water at a low cost. PV self-consumption for Daikin Altherma is optimising the energy consumption of the heat pump by using the energy generated by the PV panels. This is achieved by using the solar energy, which would normally be injected into the grid, to heat up the domestic hot water or to buffer energy in space pre-heating or pre-cooling. Home controller supporting Modbus RTU/IP Daikin HomeHub EKRHH P1-P2 Onecta Modbus IP & RTU HomeHub Adapter This use case integrates Daikin Altherma units in a home automation or energy management system through Modbus IP/RTU. The interface provides comfort and energy features. Building management or grid controller Modbus IP & RTU Self-consumption P1-P2 P1-to-USB Grid injection Onecta Onecta Current sensor or Smart meter Logic: In summer season, DHW is generated by running the immersed 1,200W heater on the excess of PV while the multi continues to run for cooling Daikin HomeHub EKRHH or Self-consumption P1-P2 Grid injection Current sensor or Smart meter Logic: DHW generation using the excess of PV energy Daikin HomeHub EKRHH or P1-to-USB
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