Power consumption

[achimmm]

Hi community,

I have a question on how to calculate the Overall power consumption.

Am i right to take the value from inverter primary and use this value to calculate Watts on a three Phase Basis? According to the Wiki I would Not use inverter secondary for this calculation.

thanks for and help.

[MaBeniu]

Yeaa... I also struggle to get understanding what primary and secondary current values stand for.
Someone who knows more would be appreciated to share their findings.
My unit has heat pump compressor built in water tank and also 2 heating devices (buh1 3kw and buh2 6kw)

[vincent-bosche]

You can find it here: https://github.com/raomin/ESPAltherma/wiki/Information-about-Values

The INV Primary Current (A) is the current at the Input. It can be single or 3-phase.
The INV secondary current is after the power conversion process and a pulsed 3 phase current for the 3 phase motor. It has a variable Voltage (Voltage (N-phase) (V)) and Frequency (might be INV frequency (rps)).

There is no possibility to get the overall power consumption, since the BUH and controller (incl. motor) has no value to get the power consumption.
Only the compressor itself has the INV Primary Current (A).
Im my case (3HHT) I get a good value when using INV Primary Current (A) * 230 V * 3 (phases). It is a little to hight, but it's quite good!