Exactly. So I’m interested to know how Victron treat my warranty on the Multi’s if one of them is faulty, which does appear to be the case.
Can’t comment specifically as I do know that it is covered case by case. It will depend on why it is now faulty.
With parrallel systems it is a bit trickier possibly as set up goes a long way in preventing earlier faliures of one unit.
I will always recommend one unit over a parallel set up especially for inexperienced installers and installers who are not particular enough in their work and knowlege and practice.
If a product has failed and the faliure is covered because it is a product defect, it will likely be the one unit that is covered (not the whole system). So you will end up with one new.
Some distributors / suppliers will help with a lower than market cost second unit to make the pair again. But again that depends on your relationship with supplier/distributor (and the supplier).
That being said, if you have purchsed units near enough in age and there was an ‘issue’ in that range it could be handled differently and both replaced. I am speculating here. But from experiences with other items in the product range i have found this to be so.
Until now I had 3x MultiPlus 48/3000VA all running in parallel, it was tricky to get cabling right and in the ESS mode grid setpoint was all over the place under bigger loads /3000w+/. So I to get rid of all of these problems I replaced it with 1x MultiPlus II 48/15000VA which is a dream to run, much more silent and no problems anymore with balancing of loads… so 100% get just one unit. Even if you have 3x and one breaks whole system is down, until you program it again via VE.BUS.