Hello,
my setup
- 6x multiplus II 5000/48, 3 phase and 2 parall of each phase
- some batteries with 48V
- some MPPT RS 450/100
- Fronius Symo connected to the AC out of Multiplus
for 99% of the year thats ok
my public grid is very small, so i can only use below 16A for each phase.
if i connect the multiplusses to the public grid for charging in 1% of the year, always
the tiggers the fuse eached second try connecting it. i think the transformators in the multiplusses
are the reason. i always have reduced the power on AC in to 10A in the multiplus setup.
next small problem is, that i need for 1% of the year a anti-islanding box.
now my idea is to connect a 48V charger connected to the public grud direct to the batteries to charge them if the SoC is below 20% in winter. ideal would be a 3 phase charger. ~8 A input for each phase. so than i have ~ 5000W => max. charge current for 48V is round aboud 100A. That would be glad.
i would start the charger with the relay output of my gx device if SoC is below 20%.
does everyone know a charger that i can connect parallel to the DC 48V Bus ?
Thany you very much.
Thomas
