Hi,
is it possible to combine
2x Victron Multiplus-II 48/3000
1x Victron Multiplus-II 48/5000
with 3 phases to have on the first phase a little bit more power ?
Thanks
Thomas
asked
combining multiplus II 3000 and 5000
hello,
i know only one posibility, to combine different type of multiplus. you can connect the output of the first to the input of the second and limit the input-current of the second to the value, the first is not overloaded. you can add the power of the two multiplus to get more power (not 100% of every multiplus, but 80-90%).
this is possible with 3-phase- or single phase-systems. you can also add on multiplus to one phase of a 3-phase-system. but don't connect 3-phase loads to the added multiplus. this can make problems and you must limit the input-power of the added multiplus to a value, you can get from the from the 3-phase systems when the 3-pase loads are on or you will overload one multiplus of the 3-phase-system.
i have install two 3-phase systems (multiplus 24/5000 and multiplus II 48/5000) and can change this to be the 24/5000 first or the 48/5000 first). but i can't get the maximum power of 8 kW for a phase. i think 7 kW is possible without problems. but with 21 kW for 3 phases, i have enouth power.
a friend have connect one multiplus 24/3000 after a 3-phase-system with the same typ to have more power for 230V devices.
it is also possible, to get more power (max 200% of one multiplu) from a 3-phase-system if you add 3 trafos 240/120V and put them on secondary site in serie. you can split the power (50%/25%/25%) to the 3 multiplus if the power factor is 1.
goodby
All units have to be the same. We had this question already a few times in the community.
https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems
Hi Matthias, do you know if this limitation of identical devices also applies to ESS with external control (ESS mode 2 or 3)? Thanks, Michael
@smueff1970
If you want one phase with more power, you can add second MP-ll i parallel at that phase.
They all have to be identical models to make them work as 3-phase, but to make two work in parallel their hardware revisions must be close.
https://community.victronenergy.com/questions/91403/how-to-balance-2-mp-iis-in-parallel.html
Thanks for your interesting comment. It‘s the first time that I‘m reading about using an (unbalanced) number for different phases. Victron usually talks about „sets“ (of three).
To be clear.
I never tried this myself, but my Victron installer told me that it is possible.
I have 3 phase and 2 MP-ll parallel per phase.
I asked him, what will happen if one MP-ll fails. Will the whole system be down?
He said that that one phase can be configured with only one MP-II and will provide less power.
