The + battery post has a thick base plate but the - battery post dies not have one. Is this correct?
The + battery post has a thick base plate but the - battery post dies not have one. Is this correct?
The 48/5000 is similar. I guess the asymmetry in the connections stems from the B- connection being at or near ground level.
I see also there is a legend "B1" on the left hand pcb only, this is perhaps for the component "Busbar 1".
Respectfully, I doubt that the potential of the connector vs ground, as such, is a factor at all. My LiFePO battery seems to have its case connected to a point in the middle of a series-connected bank of cells, for example, and thus the earth is equally close to (or far from) either terminal.
Further to this, the potential difference that matters for this discussion is not so much that between the positive and negative electrodes (or between either and earth, if the latter is in any way connected) but rather that small fraction of the total that appears across the (hopefully small) resistances of the contact points. What we are worrying about here is whether a thing that looks like the inside of a sweetie wrapper can conduct tens of amps with a sufficiently low resistance that the heat it can dissipate will be enough for it not to melt. The potential of the sweetie wrapper vs ground does not matter in itself, except insofar as the total potential difference between the battery electrodes determines the current that will flow.
I think the answer lies rather in the fact that that hunk of flat bar is an appendage of a heat-sink inside the case, which may be connected to the (internally connected) case of a transistor (or a bank of them) inside the big blue box.
Victron are too quiet on this point - it is an obvious question and there should be a note in the manual for the novice Victron owner. One electrode looks like a tombstone and the other like the foil in a cigarette box, and some explanation is required.
Thank you all for weighing in. My MP-II works fine, but a quick check it out Q came to peace of mind with you three members weighing in
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