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I just bought a MultiPlus II, a Cerbo GX and a battery with the objective to charge the battery during off peak hours and use it on peak hours.
I do not have the EM24, but as I'm a Home Assistant user, how can I supply to my Victron the grid consumption / injection through Modbus or MQTT? On the end my idea is to emulate the an EM24 through Home Assistant
Thanks for your support
this data is gathered on a connected linux device close to the grid meter and make this data as is available via a TCP stream (telnet) server that can servce multiple connections ( I also use this data in Homeassistant)
this is then inserted into the dbus and show as grid values ( not as grid meter and therefor has some restrictions )
it works fine for ESS and does just that
if you have a Smartmeter with V5 protocol (DSMR) you can save the 300€ for the em24
I will make this available on github somewhere next month once I have worked out other stuff as inserting Solis PV data (still working on that)
Please do share your code! I'm in the same boat and was thinking about creating an interface for an ESPHome connected device on the P1 port. Your code might help me get there (or I might just end up using your code).
What are the restrictions (due to it not being a grid meter?). I know the P1 does not provide the in/out energy for each phase, but I don't think that is used by ESS.
This is quite a challenge. Right now there is no way to inject meter data via Modbus or MQTT, you can however inject it onto the D-Bus but it is probably more hassle than it is worth at the moment.
It is currently very easy to change the ESS Grid setpoint via Modbus or MQTT. If the setpoint is negative the inverter will export and if it is positive the inverter will import from AC-IN. If you are going to do high frequency updates, i would use ESS Mode3 and directly command the inverter. You can then just have a simple script that takes your Grid data from home Assistant and then sets the ESS Grid setpoint via Modbus, this will give you the results you are looking for, however the VRM portal will be incorrect.
https://www.victronenergy.com/live/ess:ess_mode_2_and_3
@shaneyake , the mode ESS in External control and correcting the expected load of MultiPlus via modbus register 37 is working well. Now I go to try to manipulate the D-Bus (any tip where to investigate?) to benefit from the full control features of ESS.
Thanks again :)
I am working on such a repo right now.. https://github.com/timostark/venus.dbus-iobroker-smartmeter
Here you can emulate a smartmeter from iobroker values. Far from beeing perfect, but it is on the way :)
Note: iobroker is required but with minimal adjustments ofc any rest api can be used..
