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
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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.

4 comments
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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?


0 Likes 0 ·
jwy224 avatar image jwy224 commented ·
Hey rickc I'm have some trouble setting my em530 up with the American grid. Was hoping you might help me with some settings. Mine does the 2 phase to 3 phase thing with is bla but not important to me at this time. My biggest problem is the CT modifier. The setting on the em530 it's like 1 to 2000.which number are you using?
0 Likes 0 ·
Show more comments

Related Resources

Energy Meter Selection Guide