Hi Victron users and professionals.
Just installed a small system with:
Multiplus ii 3000
Smartsolar 150/60
Cerbo GX
4 x 134ah vision AGM batteries (48volt system)
I'm trying to control the ESS with external control. I have a control loop instructing the setpoint on MQTT. And its working great when there is no sun :)
When charging is starting from the SmartSolar suddenly the Multiplus is providing more power then instructed by the control loop and is causing grid feed in.
The problem get worse when the battery is close to or fully charged. Then almost all power is inverted into the grid. When it hits the 2400W limit of the multiplus the solar charger stops charging for a second and the multiplus stop feeding in. Then the solarcharger goes back up and multiplus starts inverting more then instucted again. And so it continues until the sun goes down.
As i'm using "external control" the "feed in excess" options should be disabled?
Almost seams the SmartSolar charger is not able to throttle down the charge current to prevent overcharging the battery and then the multiplus steps in at takes current away by inverting it the the grid?
Maybe the charge voltage is not syncronised between the solarcharger and the multiplus? Can't seem to find the place to change settings for this?
This is the charts for today.
