question

The referance voltage that is being used is faulty, on the main referencing device, to use the smart network you should ONLY be connecting to a BMV 712 or a smart shunt device. or the smart battery voltage sense unit.

So make sure the BMV is the master unit you are connecting to

suggest

Delete the existing smart network on all devices

then on the BMV make a new network - and connect the other units to the BMV units smart network

Hi Bartholtl,

Relax! Your charger is behaving exactly as expected. The smart network allows the charger to "see" and respond to the actual voltage at the battery (as measured by your BMV). The battery voltage in your screenshot is less than your absorb set point, so the charger increases its own voltage to compensate. So you get faster charging at higher amps - in this case 17amps vs 4 amps without networking.

However, you do have a rather large voltage drop, almost 3v, between the charger and battery. This is more than expected. I see less than 1V drop at 25A in our van system (older IP 67 12/30 charger which sadly does not have networking facility!) You should check your wiring, connections, any fuses or breakers for high resistance.

Cheers, Leslie

Thanks Paul and Leslieanne, good suggestions! It makes sense that the charger compensates for the voltage drop. Yes 3V drop is a lot, but my wiring from the IP22 charger to the batteries is fairly long (although it is 10 gauge). I'll experiment with bringing the IP22 really close to the batteries, that is easy to do. Thanks again!