question

wnic1 avatar image
wnic1 asked

EM530 with PV on phase 2

Hi

I have a EM530 meter connected to a cerbo gx, the grid is on phase 1 and the pv inverter is on phase 2 using CT's. The meter is set to 3 phase mode otherwise there is no current shown(voltage shows fine in 2 phase mode)

Every time the cerbo restarts it changes the meter to run in 2 phase mode which stops it from reading current and you have to change it on the meter back to 3 phase mode

This seems like a bug? is there any way to stop the GX from configuring the meter?


Thanks

Energy Meter
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2 Answers
wnic1 avatar image
wnic1 answered ·

I found this while going through the code, so it may already be fixed when the next version comes out

em500: Always use Measuring System 3Pn

EM500 doesn't seem to like 2P mode. Power cancels out and the
piggy-backed PV-inverter is not correctly measured.

https://github.com/victronenergy/dbus-cgwacs/commit/fe2055d037230b198b82654085728d3a702a591d

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rickc avatar image
rickc answered ·

I’m using the EM530 for USA split-phase L1 and L2. Similar problem, but have to manually reset the EM530 to 2P whenever the power goes out, or I reboot my Cerbo GX. It keeps going back to 3P mode, which I don‘t want. The fix must be done in the source code above, or use MODBus commands programmatically to reset the EM530 to 2 Phase mode. In my case, the extra L3 phase is just an annoyance.

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dashti1995 avatar image dashti1995 commented ·
Apologies, this is not an answer to your question. I have trouble finding the meter on the GX. I am using the correct cable and the EM530 meter. Is there any special setting to be done on the meter to be shown on the energy meter?


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