Firstly, thank -you for the very prompt response to my question yesterday.
I got a very favorable quotation in the meantime, so much so that I am considering Quattro 8kVA building blocks instead of Quattro 5kVA models (budget-agreeable).
Anyway, doing my due diligence:
What is the difference between the two FW versions please?
And please can you tell if either or both FW versions expected to be available for the foreseeable future?