How to reset/zero out Energy Meters (Electricity and Heat Energy)?

[gonzalorui]

Hello again,

I have recently installed the P1P2MQTT hub and I've noticed that the energy meters (both for Electricity and Heat) were not at zero when I started. They already show accumulated values from the heat pump's internal memory.

For my daily and monthly tracking, I would like to start from zero.

Questions:

Is there a specific command to reset the internal counters in the hub?

If a hard reset isn't possible, is there a recommended way to handle an "offset" via MQTT so Home Assistant sees the value as zero starting from today?

Thank you for your guidance!

[Arnold-n]

The counters are not stored in the hub, only retrieved and forwarded. They are stored inside the Daikin heat pump (the MMI also shows the counters). You can reset the counters in the MMI, but you will lose all historic data.

The MQTT bridge can store the "initial" counters in parameter P45 and P46 and uses these to calculate the average COP before and after bridge installation. You'll need to store new counter values in P45 and P46 with command D5.

[gonzalorui]

Okay, I see. The 424 kWh recorded by the Shelly matches the sum of: 331 kWh from the compressor in heating mode, 85 kWh from the DHW (Domestic Hot Water), and 10 kWh from the backup heating.
​However, there is another consumption reading of 476 kWh, which I believe is the heating element: sensor.bridge0_meters_electricity_consumed_backup_dhw.
​The strange thing is that it has always been disabled.

[Arnold-n]

How was it disabled? The consumed_backup_dhw does not measure consumption, but measures time DHW relays is switched on multiplied by the configured power of the DHW element. The Daikin unit does not know if the DHW element gets power or not.