Sounds like a plan. As you know, I like the
Victron Multiplus's and the EasyPlus (which is a
Multiplus 1600 plus a Consumer Unit Combo for less money than a
Multiplus on its own) is a very nice unit
Ref the disconnect to the charger when
Solar is active. With the EasyPlus I am using the BMS Assistant so I can disable the Charging function of the
MultiPlus whenever I want to. That way I can keep the AC live at the same time if I want to. Currently it is just driven by a remote relay but you could easily drive it by other means I am sure. I have that in place ready for when
Solar comes into the picture (maybe drive it from the
Victron MPPTs load output programmed in some way, but you have a host of options in your monitoring setup).
I do like the idea of a redundancy (I snipped a wire to disable my intergrated split-charge but might add a switch so I can re-enable if I had a need to).
If you assume a 0.7V drop on the diode, I guess potentially an alternator at 14V or so could start putting some charge into a charged
battery bank if you have some load on it that takes away the 'surface charge'? would that be a concern? You could add in a relay in series and so manually (or automatically from an appropriate signal) disable to stop it happening?
Must say I would have concerns about higher currents than designed going through PCB tracks. The Nord might be different, but the typical PCB for any product is not usually overendowed with thick copper tracking.
Maybe ask Jonathan about how a B2B acts when the load is removed? I think I have had a similar discussion when looking at my VSR/B2B combo where that happens but was quite a while ago when we were just chewing the fat. Nothing untoward ever happened, but worth an chat maybe?
