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OpenEVSE V4 WiFi gateway using ESP32
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Wrong consumption values on 3-phase connection #809

Closed vermut closed 5 months ago

vermut commented 7 months ago

OpenEVSE reports consistent set of metrics, but they don't line up with other sensors outside OpenEVSE. It's like it's using max current for calculations instead of actual current.

OpenEVSE world

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2.5h 21A 220V * 3 phases = ~34kWh

21A is the limit set in OpenEVSE. Everything is consistent with each other.

Everything else

I'm charging RAV4 plugin that has battery size 18 kWh. Power sensors on solar inverter and data from electric company roughly match each other and say that during that period only ~7kWh was consumed. They may be inaccurate but not THAT inaccurate.

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And my daily consumption (those are accurate from electric company) is never even reaching this value. image

OpenEVSE: 8.2.3.T2
OpenEVSE Wifi: v5.1.0_modified image

zerodur12 commented 6 months ago

the RAV4 on board charger (AC) is a 6.6kW - 28A/230V 1 phase Maximum charging power AC.

Even you have a 3 phase charger you will charge using only on 1 phase. in 3 phase OPENEVSE Charger the current is mesure only on 1 phase, it compute the power on 1 phase and multiply the result by 3 assuming the 2 other phase are loaded with the same current.

1 your case 2 phases are unloaded the repported power is wrong and has to be divide by 3...

vermut commented 5 months ago

If it's one phase, maybe the solution would be switch OpenEVSE to 1-phase mode?

vermut commented 5 months ago

I did that.