Quote:
Originally Posted by Jerry Woodward
I have a smart bmv712. Just to be clear, When I get my new victron solar controllers, I can connect the BMV to them and it will relay tail current? Can't the solar mppt sense tail current current anyway?
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To sense tail current you have to be able to differentiate what’s going into the battery as opposed to coming out of it.
So no a mppt device can only sense charge current and only charge current that it’s producing.
Yes if you add a BMV712, it will relay total battery current. So the Victron mppt can therefore assume that the difference between its current output and the BMV712 is in effect tail current ( that can be confused where’s there is multiple chargers but Victron Ve.smart
network handles that too )
I use this approach on my mppt , Victron mains
charger and bmv 712 to correctly deduce tail current and also to synchronise the chargers.