Watt values way different between Multiplus and Battery BMS

DIY
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1

Hi all,

I have a question about the values that my battery BMS and the Multiplus are showing. The amps and voltage are almost identical however the wattage is way off.

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In above screenshot we see that the voltage is 53.71/0 and the amps are 56.0/55.8. As long as I can remember wattage is calculated by voltage X Amps which means 53,7 * 55,8 = 2996,46 watt. The BMS of the battery is almost right however the Multiplus is about 10% off…..

Any idea where this difference is coming from?

2

Answered on here several times, the W value in the Multiplus box is the ac power W, not the DC power W. 3355W ac into the Multiplus converts at 90% efficiency to 3000W DC. It is confusing.