question

manta avatar image
manta asked

Strange value's

I have this Seplos 15Kwh battery installed at home and it works fine but strangely the to grid and from grid values seem to be inaccurate.


Ive only connected to AC-IN, and use ESS. Nothing is connected on AC-OUT.


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What could be wrong, since there is around 60Kwh dissapreared?

ESSseplos
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3 Answers
matt1309 avatar image
matt1309 answered ·

What is monitoring the grid. Is it an external meter like an ET112?

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matt1309 avatar image matt1309 commented ·

I would track the data going into MQTT outside of gx device. might narrow down where the error is ie is it inside gx device/custom driver code. Or is it wrong from the meter

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manta avatar image manta matt1309 commented ·
The MQTT data is reliable, i am thinking the BMS of the battery is creating this deviation in stored an used energy. I would like to add a smartshunt to check the readings.
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matt1309 avatar image matt1309 manta commented ·

I suppose you could record the meter data externally and then compare it to what's appearing in the GX. That would confirm other data points (like BMS) is impacting the information.

I thought meter data was the only thing that impact the grid dbus/mqtt that VRM uses but may be wrong.

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manta avatar image manta commented ·

Its an external power meter P1 DSMR meter over MQTT with a 1 second interval. Very precise reading since this is a calibrated (certified) grid meter.

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manta avatar image
manta answered ·

1710767779972.png

Can't figure it out. seems to me i am losing around 28% energy, thats much.


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matt1309 avatar image
matt1309 answered ·

Is the meter data going to the correct MQTT topic?


What values are you expecting to see?

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Related Resources

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What is ESS training video

ESS Quick Installation Guide

ESS design and installation manual