We have deployed the 3phase firmware (GitHub - openenergymonitor/emontx-3phase: emonTx 'approximate' 3-phase firmware) on a few emonTX and the values measured against another meters and equipments are always different. In one case we are measuring the power production of a 3phase solar inverter which displays the current generated power and the values do not match with the emonTX.
We followed the instructions at emontx-3phase/emontx-3-phase-userguide.pdf at master · openenergymonitor/emontx-3phase · GitHub to find all the phases and sequences and identify the phase with the power supply.
The readings of all phases are apparently always half (not exactly) of the true readings.
How can we solve this?