Hi,
Helping a guy out with a system that he sourced meritsun powerwall batteries.
The cerbo shows it as the pylon batteries. So have used the pylon victron live settings for it.
However the system does not seem to charge, if you go into the parameters of the battery max charge voltage is 57.6v and the amps available max is 190
Tried putting it on a schedule charge and it will not take any energy, there are no warnings.
Anyone had experience of this?
Yes, currently the system locks the max charge voltage to 52.4V when it sees a pylon BMS, so on larger cell batteries which spoof pylon it won't charge properly. A few topics on the subject here. If you use the search bar, you can find a code mod for DVCC to disable this behaviour.
The latest beta should also allow you to choose 16 cells instead of 15 which will improve the situation.
That's the risk with unsupported batteries.
IL see if I can find posts, struggled earlier searching
You can leave it managed once DVCC is tweaked, or if the beta code works for you (haven't tried the latter myself).
Have a look here https://community.victronenergy.com/questions/163988/mppt-limited-to-5240v.html
and
https://community.victronenergy.com/questions/180667/venus-os-v30015-available-for-testing.html
Not with Meritsun. But another battery that also identified as Pylontec.
You have to disconnect the comms and use battery recommended setting to program everything. Usually the battery needs higher or different charged and float voltages than Pylontec use, so the conflict will not allow the system to charge.
Run them dumb... No comms. They are an unsupported battery anyway. So unless you know how to edit the software on the GX, there is not much you can do.
Make sure the customer is comfortable with the idea of beta or customisation. If they arent the BMV is always an option.
You need ESS if you want to prioritise self consumption.
The other two ways are virtual switch and AC ignore.
Or manual/ timed switching of the incoming breaker.
The inverter will take a cycle or so to get the SOC right but i have found unless you are fulky charging does not keep accuracy. A Bmv is the way to go with partial charging.
The internal one i have found is fine if you fully charge everyday.
What settings did you use in ESS? If it in a keep batteries charged then it wont use the battery.
Since they are new though do keep them charged for a few days to sort themselves out a bit in balancing. Then start cycling.
If you have a spare GX set up comms to the battery and keep an eye on how it is behaving.
