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if you fuse each parallel battery, I would think that the fuse after the bus-bar to the inverter is unnecessary. Each battery is already protected. There is no situation where any individual fuse would fail to trip, when your hypothetical combined battery fuse would trip. In other words, the...

Thank you, will do. We do digress... Still no progress as to the ORIGINAL question posed. No one else is curious about it? For those who do need a 48v (aka 51.2v) system, I think it is valuable information. Correct me if I'm mistaken.

Why after the bus bar? "Total output of all batteries" makes no sense. That threshold is very high and is not the determining factor in highest current in a system. Did you mean if the wire can safely carry the max load current, as calculated by Wattage * 1/efficiency * 1/batt voltage * 1.25...

I know class T is preferred for it's 10kA+ AIC blah blah... but I was just curious about ANL fuses and looking at the Eaton Bussman (reputable brand) datasheet for their fuses. See anything weird? The labelled nominal fuse Amperage doesn't trip at that nominal!

I spoke to a Victron distributor for advice and he mentioned that a 48V system adds extra challenges in terms of the solar PV panels. Let's say you put panels in series to fully utilize a Victron 250V MPPT controller. We talk a lot about being safe around batteries. But how about working with...

curious what you ended up doing. Seems like you have two well-known, supported ways of achieving your goal. PKYS article mentions both. Since you already have 2 identical units, you have fulfilled all requirements to do 240v split phase. I see no reason to deviate. you should be able to run...

Hey thanks. I did do PRIOR RESEARCH and link two threads in original post. Here is another one I missed that touches a similar topic. I did not notice any supporting evidence for answers or new considerations in that thread. Also, it does not address the new feature of using battery balancers...

That BOM gives me more confidence in their product. Since JBD's time zone is flipped from ours, can you share the full datasheet you got from them? However: Googling HY4903 shows only a 30V max Vdss though which contradicts their ad saying it can go up to 80V.

Just checked it, but the mosfets listed in the bom you posted from JBD only shows 30V max Vds. See their fet HY4903B

This is a new BMS with integrated contactor in aliexpress. I was doing some reading from the attached manual, and it seems like it might be CAN enabled which would be utopia at this price point. It is hooked up to my battery and works. Questions: How can I test this? My Victron inverter is on...

My thoughts are that the BMS is only there as an emergency protection. It does not know that the charge controller exists nor does have any interaction with it. The BMS protects against high V, low V, and hi and/or lo temperature. Simple. With this understanding, I say program your charge...

Going to try and tie this thread off. Your last post is wrong and here is why. Only in an ideal world, but the tolerances in your voltmeter, battery construction mean that you simply can not know the SoC of the cells in the middle region. For real-world, Voltage =/= SoC in the middle flat...