Dear all,
this is my first post and I hope that you can point me in the right direction. Sorry, if this is the wrong category!
I’m already running a Solaredge inverter (SE10k-RWS, 14.9 kWp, Solaredge Energy Meter) with a DC coupled battery (BYD LVS 8.8 kWh).
I’m in the process of installing a 3 phase victron system (3x MPII 48 5000, Victron Energy Meter) with various MPPTs (13.5 kWp) and another DC coupled battery (6x Pylontech US5000).
The plan is to connect the Solaredge inverter to ACout 1 of the Victron system, so that this keep producing in case of a grid failure. I’ve read the VIctron doc’s regarding “Integrating with Solaredge” and my future system will comply with the Factor 1.0 rule.
I’m unsure about the BYD battery, which is currently connected to the Solaredge system and couldn’t find any concise facts on how to integrate this.
Maybe anyone here can help:
Can I keep the battery attached to the Solaredge inverter once is AC oupled to the Victrons?
Is there a best practice approach to the placement of the energy meters? I’m assuming that the Victron energy meter should be placed directly after the grid supplier energy meter and the Solaredge enegry meter should be placed an ACout 1?
Will excess PV power from Victron MPPT’s be able to charge the Solaredge connected battery?
Will excess PV power from Solaredge be able to charge the VIctron connected battery?
Will the batteries be “charging each other”? This should hopefully not be the case.
Sorry, but there are a lot of questions in my mind and I’m trying to structure my thoughts
So i have managed to get the Victron part running and the Solaredge inverter is also producing. Both batteries are operational and I’m getting data from Victron and Solaredge via Modbus TCP into Home Assistant.
As Solaredge inverters allow only one Modbus connection I have set up a Proxy (addon in HA) that is connected to the SE inverter. I’m running EVCC (also addon in HA) and EVCC can access data from SE via the Modbus Proxy.
I’m now trying to get the Cerbo GX to connect to the proxy on port 502 but can’t get it work. I’ve added the Home Assistant IP at port 502 to as manually entered Modbus device in the Cerbo setup. The proxy log shows an incoming connection from the Cerbo and no associated errors. The Cerbo however can’t find and Modbus devices.
I’m wondering whether there is a Modbus limitation on connections on the Cerbo side? The Cerbo is directly connected to HA via Modbus (HACS integration). Could this be the cause for the Cerbo not being able to connnect to the proxy?
Modbus on Solaredge seems to be very picky in establishing connections. Had to stop home assistant (complete shutdown), disconnect the SE inverter on AC and DC, shut down entire Victron system. Start up sequence: Home assistant incl. modbus proxy, SE inverter, and Victron system.
After HA established a connection to SE i powered up Victron and was able to manually add the proxy IP as PV inverter. Most important was to switch to modbus ID of SE inverter to 126 on all devices and platforms.
One open issue remains: While I can see the AC output of the SE inverter as PV generation on Cerbo, Victron can’t distinguish between solar power and DC coupled battery power from SE inverter. I understand, that this is due to AC coupling but was wondering if there is a way to get that information to Cerbo via Home Assistant. HA has all the required information as it still receives the detailed SE power breakdown via the modbus proxy.
Assuming the power consumed by loads is less then the power generated by PV:
PV generated by Solaredge will first charge the BYD battery connected to Solaredge inverter. After this is fully charged, it will export AC power to the MPII’s. They will in turn use this “excess” power to charge the battery connected to MPII’s.
