compressor setpoint temperature abnormal electrical consumption

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I set a waterheater heat pump combined with a low temperature system (radiant floor) I used:

• the curves fit tool spreadsheet to set up my heat pump
• outdoor air only (inlet air configuration)
• setpoint temperature schedule name (42 ° C) for the tank
• heating thermostat (21 ° C)
• setpoint manager schedule (35 ° C)
• compressor location outdoors

I noticed that by shifting the compressor setpoint temperature schedule from 50 ° C to 45 ° C, electrical consumption more than doubled. could someone tell me why and which could be corrected? thank you