I just finished installing my multi and 280Ah of lifepo4 batteries with REC BMS. Everything else seems to work fine but I can't get multi to actually charge at 70A. It claims it's charging at 60-62A but when measuring with Fluke clamp meter it shows only ~50A flowing. Additionally my BMS shunt shows the exact same reading as fluke does so I'm betting that the Multiplus current measurement is nowhere near accurate...
How do I get the missing 20 amps of charging out of multi? That's quite a big drop from the expected value and increases significantly the charging time for a 280Ah bank..
I have the weak AC off, 70A set as the limit in the settings. Environmental temp is around 27-29C where batteries and multi are. Batteries were at around 70% when I started charging so they should be easily able to take the full 70A.
And to be clear the REC BMS is not communicating with Victron yet so that can't be the issue either.