I would like to operate Victron MultiPlus II - GX 48/5000 on an interim base together with one Freedom Won 5/4 Li-On battery. Later I plan to implement another Freedom Won 5/4 Li-On battery and operate both parallel. Is it possible to limit the settings in the MultiPlus at first from 5000W to 3000W ? Or do I have to choose the GX 48/3000 ?
You can use the 5000W unit and then don't put more than 3000W load on the output of it.
The FreedomWon 5/4 can provide 5KW continues, I would go with a Multiplus-ii 48/5000.
The Multiplus-ii 48/5000 is technically a 4KW inverter. So you will be fine. This isn't a great system design but if it is for a few months it won't be a problem especially if you can keep your AC loads to like 2.5KW continues but all in all not a problem.
