I recently installed a Victron BMV 600S Battery Monitor and in the process learned a lot about shunt-based battery monitors. I hope the attached paper will be of some value. Any comments are welcome.
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Not quite.The cable on the left of the shunt looks pretty small - inadequate - compared to the other cables being used around the battery. The current traveling through all of them is the same, they should all be the same gauge.
It's OEM. I'm not really sure what it is. A fuse to prevent the cable from overheating seems to be a good guess.
I understand your point, however I wired the new cable to the EXACT same battery location as the original negative cable. You will notice two positive cables coming from the bank. The yellow (end of cable) is noted as "coach battery." The orange (end of cable) is noted as "inverter." This is the way Winnebago built it.To help equalize the current through the two batteries, the new negative cable should be connected to the left battery, not the right hand battery.
The device in question is undoubtedly a Fuse. It is there to protect the wiring and is in the right place, close to the battery terminals.
Inverter is 1000 watt. All wiring is OEM except for the 2/0 I added. This was built by Winnebago, not MB.Must be the photos. MB uses 1 ga to the aux battery, the cable I questioned looks like a 2 or 4 gage.
For something like a 1500-2000 watt inverter more than a just a couple feet away, 1 gage would probably be too small, most guys here are using 2/0 or thicker. Lots of threads here, lots of info in the various inverter's instruction manuals.
That's definitely a fuse, very much like the one MB should be shipping with their aux fuse holder instead of a piece of solid copper...
Makes sense. Thanks.TJ,
Yes, you can move the orange term wire to the left battery as this is the easiest to do! It will satisfy the current sharing a little better.
As the winnebago diag shows, the fuse is in the feed to the inverter and is rated at 150Amp.
Your neighbor/electrician has rated the new cable OK, the bigger the better! good to see crimped and insulated sleeves on the lugs.
For safety reasons I suggest temporarily removing the earth cable on the current current shunt before relocating the the orange wire.