Inverter reading higher kwh than meter ???

[pvman]

I thought the difference was due to the efficiency of the inverter and the meter reading on the inverter was calculated before the dc to ac conversion.

Tom

 

[Scobo]

Just to update, the Optismart came yesterday and the Envir display is reading 29 watts this morning whereas the owl is reading 185 watts so confirms my thoughts that the owl is way off at lower power generations.

 

[esentinel]

Hi, the problem I think is related to how the meter calculate the power.
I mean does it evaluate Vrms and Irms ? I know envy and Owl have the voltage set to a fixed value. This is the first problem of error. The second is, as you tell, at lower power caused also probably to the power factor that if not considered would put a big error.

 

[Gerald Brady]

I was concerned about a mismatch between my inverter and the generation meter. My sunnyboy remote meter agrees with the inverter and the generation meter is about 100kw behind them. This is over 10 and a bit years though (36,500 KW) so perhaps I shouldn't be worried. A 6% discrepancy sounds like something that needs looking at though.