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If anyone is interested, here's my solution with ABB OT63F4C I-0-II switch (4+4). There're also special switches for this purpose like Sontheimer ULO63/4T/NS/Z101/F976 or Kraus & Naimer KG20A K950 VE2 F437.

Thanks! I didn't find the exact specs I need - MCCB DC Circuit Breaker 100A 2 pole. And ended up with Noark https://www.outbackmarine.com.au/noark-100a-500v-dc-circuit-breaker-2-pole They're available in Australia only, so a bit challenging to get.

Hi @wanderinglostadventures, Could you share what Circuit Breaker model have you installed? I found it's hard to get a good quality 2P DC Circuit Breaker of that size.

And I just happily burned my Cerbo GX. Wish I've seen this before.

I have only single phase loads and this is for super emergency cases, like war in my case. When the switch in position "I" - all 3 phases work as usual, inverter/charger can work as a charger only from L1. Position "II" - the whole apartment feeds from L1 that is backed by inverter/charger with...

Already did. It'll take 2 months. Not the best time for breaking when living in a warzone in winter during constant blackouts. Your video was super helpful anyway.

Hi Everyone, Please share decent LiFePO4 BMS models that work with Victron inverter/chargers and a few words with feedback if you tried them personally. The aim is to make the charger to manage the current (e.g. throttle down) based on info from BMS. Does it even makes sense for 48V home backup...

Thanks! I heard about this solution from OverkillSolar Support and here it is. Do you have a single battery batch or a few in parallel? I know that in such configuration the BMSes are connected sequentially and only one communicates with a Venus OS device. I wonder if the driver will work...

This is a solution for emergency cases when no power available and loads are within 1200W. I have 3 phase power in my apartment and Multiplus II 48/1600 inverter/charger for backup. The idea is to put 2 switches (3+3 and 3+3 with extra module) in the middle after the main switch like this...

I've Victron Multiplus II 48/5000/70-50 230V, 280Ah x 50V capacity battery. The inverter allows cont. discharge 4000W and peak 9000W, that is ~80A and 180A discharge current respectively. So 200A (or greater) BMS would be fine. But the question was about connectivity with the embedded Victron...

The scheme is correct, but the switch is not. There should be special switch with "leading Neutral". Basically any switch of this configuration where N contact is marked explicitly. E.g. Sontheimer Switch 63A 4-Pin 22 kW Mains 0-Emergency ULO63/4T/NS/Z101/F976

Did you compare it to Victron Multiplus II ? If so, what's the difference except the price?

I guess there must be an adapter made by BMS manufacturer for connecting RS485 to computer or any GX device. Check this video