Hello,
I use a Multiplus2GX with Firmware 485 and 2.80 -21 to build a controllable ESS with a pylontech US2000C. The hardware is installed and the commissioning has been done with a MK3 and VEConfigure. The grid code selection for germany and installing the ESS Assistant with respect to the pylontech limits and values was quiet easy...
The communication to the MP2GX is done locally (LAN) to the internal victron broker - the keepalive message is transfered periodically and can be adjusted based on the topics I need for controlling the unit. On the WebFrontend the name is set to ESS - and the ESS (menue) page is available; here I have selected "external" control to switch to ESS-Mode3.
I use the mqtt-explorer to debug the information I send to the MP2GX and compare the behavior of the unit with the CCGX-Modbus-EXCELL sheet (the 2.70 vesion).
Everything works fine - except the FeedIn...
I can set the system to Passthru writing a "1" to the /Hub4/DisableCharge and /Hub4/DisableFeedIn topics and charging the battery works fine if /Hub4/DisableCharge is "0" and /Hub4/DisableFeedIn is "1" - the amount of power, pushed to the battery is controlled via /Hub4/L1/AcPowerSetpoint with positive values > ACOut (Loads).
Switching to FeedIn (/Hub4/DisableCharge =1 and /Hub4/DisableFeedIn =0) and changing the /Hub4/L1/AcPowerSetpoint to "0" or a negative value, always leads to "Passthru"...
I have checked all limits, tried to use the CGwacs with Mode2 - I have downgraded to the 2.73 and tried to get the FeedIn running - no chance. It seems to me, that there is a deep adjustment I do not understand which disables/blocks the FeedIn to the grid...
Perhaps someone can give me a hint ;-) Ideas are welcome.
