I am using Multiplus 5k inverters on 48V batteries and finding that I cannot set the input current limit lower than 6A. This is often a problem, as I want to use a very small generators to charge the battery. Can anyone suggest a way to achieve a lower input current limit on my multiplus? Thanks!
cheers
Hugh
It’s a hard limit, often discussed on topics in the old forum.
If you disable PowerAssist you can reduce the input current limit lower. The manual shows the lower limit with PowerAssist enabled.
Thanks, Ed,
It’s good to know. That sounds like an easy solution, but of course when I think further about it, I would not want to disable power assist. My available output would then be limited to the very low level of the input current limit. So my inverter would be pretty useless during the charging period. It becomes only a very small battery charger during this time. It solves the problem but creates a new one.
Thanks, but no thanks.
I am working on a solution using a MPPT controller running off a DC supply. That way I can keep the BMS happy.
I didn’t say it was a good solution but it’s a solution. You can create a flow in NodeRed that will do this if that’s of interest to you. Otherwise, your idea a PS and a MPPT will work or you could simply buy a small Victron IP22 battery charger. Good luck!
Yeah the reason I don’t use the charger is that it’s a 48V pylontech battery with a canbus BMS. Hence the Smartsolar instead. I hope this works for me. 48V chargers are costly. The battery does have an “allow to charge” contact but I am not sure this option is covered by warranty.
Thanks for your helpful input though!