I have had my pair of Multiplus II 48/5000 (240V) running in Parallel for a couple of weeks now, and they are working fine. (other than a dodgy fan in one of them)
but I have a load of parts leftover !
when I started my Victron solar journey, I bought loads of stuff that I thought I'd need and then bought other stuff that was 'better' (differant)
So. I have four Epoch 12v 105Ah LiFePO4 batteries (that I was going to connect as a 48V pack)
a 500A SmartShunt, a SmartSolar MPPT 150/35, a heavy duty DC isolator (Icu 85kA)
loads of 50mm2 and 75mm2 cables and Lugs.
A Raspberry Pi with Venus OS and a load of USB to VE Direct DIY Cables, set up and ready to go.
I can't hook the 4 Epoch batteries up to my main (BYD battery) system.
But I could buy a small Multiplus 48/1600/20 and cascade them ?
Thinking of setting up a second "separate" system that just powers my office (using about 2kW per day)
that part is not that complicated
is how to set up charging and pass-thru
I don't really want to set up more solar... so would like to only charge the 4 Epoch batteries, from the main system, once the BYD batteries are full, and we have excess solar.
and would like the Multiplus 48/1600/20 to go into passthru if the 4 Epoch batteries are low
And I just can't work out the best way to do it.
I was thinking of using a Shelly 4 Pro to switch power to the Multiplus 48/1600/20 once the main batterys were full, but then how would I work the passthru, if both sets of batteries were low.
and how would I stop the Multiplus 48/1600/20 from drawing power from the BYD battery to charge the 4 Epoch batteries (that would just be a waste)
there must be a way... anyone :)
thanks in advance