I have built a battery box with a 12 volt 50ah agm battery.
I would like to charge the battery via the "Victron Orion 24/12 5A"
(It's a non isolated model. But does have + - wires for input and a + - wires for the output.) Via the cars 12 volt Cig socket. The charging does work.
However what I am finding is. The car thinks the alternator is still going when the car
is off and we go to lock the doors. What happens is the doors won't lock.
I beleive the car thinks this because the 2nd battery has 13+ volts in it.
And that voltage is going back through the "Victron Orion 24/12 5A".
I can detect the 2nd battery on the output side of the "Victron Orion 24/12 5A" through the input side of the "Victron Orion 24/12 5A".
I need to run a possible solution via this group.
A simple diode on the input positive side would stop the back feed.
I don't want to put the diode on the output side because this might affect the DC/DC charger algerithims. (It does with other smart chargers I have used.)
Do you have any suggestions/comments.