That is understood.Paralleling old and new machines is quite tricky. The only success that I know of is 72.70 on the old, and 74.10 (or later) on the new. That means you can't run patched firmware, and you can't have the 64 V option.
Yes, those MK 48V versions can do that 64V, but firmware... not yet, I guess?
That seems a bit drastic. But if you do, I'd suggest getting 64 V models, if you want the option of running patched firmware.
What I think which is similar is http://voltronicpower.com/en-US/Product ... -3KVA-5KVA. At least it looks like same and specs are same.I'm sure that there are plenty of 5048 models out there. Perhaps search for the Axpert MKS 5K-48 (not the MKS II), which is a more common name for the same thing.
But I understand you mean, if I still look those older ones. Well, I got those MPP Solar PIP-5048MK marked about the same price than MS version. There was only 17,65€ diffrence (by three).
I can sell my 4048MS units to forward, I have buyers already, but I can also use these units to charge my Leaf . Of course that 22A per phase also is enough because I have Accelev and it can combine two phase to one 250Vac. By now my utility feeds a 3 x 25A, so difference is not that much.