I first has the system using a CT on the grid supply. This was problematic as when the grid connected PV was exporting to the grid, it would be a -Ve value on the CT and the Multiplus would disconnects it’s AC in.
With this CT the ESS feature would work fine when there was no sun, and ran the loads off the inverter, leaving the grid import at ~50watts.
After much reading, I noticed that I need a Grid Meter, so I went and got the ET112 installed. I can now see the Grid Connected PV doing its things and exporting to the grid. The Multiplus now see’s this -ve figure and uses this excess power to charge the batteries.
BUT, now the ESS feature is partly broken, with now the inverter not covering the load and having the import @50Watts.
When I went back to the CT, the system would generate and cover the usage.
I then went back to the grid meter and it would not.
Also Peak Shaving appears to not work either.
Anyone have any idea what’s going on?
This is what it does during the day. (Which is right)
Without knowing all settings its a guess whats going on.
Try this video for an understanding of some things https://youtu.be/8Y8s80J4QYk?si=M_f-o9qqla7kG8yU
Ps i had an et112, but didnt like how laggy it was, so tried a CT, which i found to be more faster responsive to load variations, have had CT ever since and sold on et112.
Thanks 1234enough. I have watch that video now and i see the way it is meant to operate.
Funny enough I connected the CT back up to the inverter (so i have the external meter and CT connected to the inverter) and left the ESS Grid Metering set to External Meter and it started working. The only issue is the AC load on the AC in side is appearing as Critical Loads.
I have a very similar system. I use a CT on the grid and a “Victron Current Sensor” to measure the PV generation. Have you tried setting the Grid Metering option to Inverter/Charger instead of External? If you’re using the CT you normally use the Inverter/Charger setting. That said, if your unit has the newer connector block for the CT instead of the original jack plug, it might not make any difference.
