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I have old Multiplus 12-1600-70-16 230V with softwear2606154.VFD and i have installer a simliar unit with soft wear 2606413.VFD. I will connect them in parallel , do I need to upgrade the soft wear on the old one before I connect them in parallel ? If I need upgrade the soft wear can u send me the correct version. Thanks Vidar
Yes, you should upgrade both of them to the same version. 2606433 is the latest.
Only if you feel confident upgrading firmware yourself then you can get it here:
https://professional.victronenergy.com/
If you don't feel confident doing this yourself or you think you will break it, then get your dealer to do it for you.
