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petajoule avatar image
petajoule asked

GX won't let me change position of PV Inverter energy meter and freezes when I try harder

OctoGX with two EM24 3p energy meters each connected via USB<->RS485. Octo Firmware updates to 2.89


The energy meters are installed as follows:


1658657283757.png


The PV Inverter is on the AC-IN side. Now the problem is, that the (upper in the picture) EM24 energy meter that measures the PV Inverter output is set to AC-IN2 which leads to the Generator showing the power that comes from the PV Inverter as negative power.

Unfortunately I can't even show the VRM screenshot, because it's easypeasy to crash VenusOS - and the whole GX device - by playing around with changing energy meters positions and roles. And when you remove "disconnected devices" the GX freezes.

It seems to still be able to send data to the VRM portal, but I can't connect to the remote console anymore.

After reset and rectifying as best as I know:


1658660133402.png



em24octopus
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1 Answer
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi,

It should work properly if you wire the AC PV inverter energy meter to the Load side of the grid meter.

cleanshot-2022-07-25-at-102240.jpg


That is basically how mine is setup and this is how it presents in VRM;

cleanshot-2022-07-25-at-102420.jpg

Wiring something outside the grid meter is just going to confuse the system, because it is intended to be the 'last' element from which other values are calculated (based on the Multi's AC input measurement, and the other energy meter data).


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Related Resources

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Energy Meter Manual EM24 RS485

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