The differences between the Mk2 and the Mk3 were very minor and make no difference at all for most applications. We still sell the Mk2 because the newer one doesn't work with the Phoenix chargers.
Installation package for large systems/extended features.
This package contains:
To connect your computer to a VE.Bus product (Multis, Quattros and Inverters), you need an MK2-USB (ASS030130000) and an RJ45 UTP cable (ASS030064xxx and ASS030065xxx).
USB driver installation program for MK2 USB. To install the MK2-USB driver on a computer without an internet connection, first download this program and run it, and only afterwards connect the MK2-USB to your computer for the first time.
More documentation:A guide to VE.Bus Quick Configure A guide to VEConfigure VEConfigure in Simple Mode VE.Bus firmware versions explained VEConfigure 3 manuals