Fuse Fire

chrisski

Solar Addict
So with a 25 amp fuse, this is the chart off the blue sea website for a ATC/ATO fuse:

1626914345759.png
So, with a 25 amp fuse running at 27 amps, that would be at or just below the trip area, so I wonder if it found the sweet spot where it was very hot, but not at the spot where it would melt and stop the current.

Probably was more to do with corrosion.
 

mitiempo

Solar Enthusiast
Attached are the pictures showing the fuse before it burned up. This is also before I replaced the batteries. The new batteries only had the single threaded post so I had to move the one wire in this picture that was on the other post to the stud with all of the others. Is there any issues with all of the wires going to the 1 stud? I would like to find a better copper plate to spread out the connections.
There should be a minimum number of wires on a battery. Other than any cables linking batteries in either series or parallel there should be only one positive and one negative wire on a battery or battery bank - plus a temp sensor if there is one. The main positive and negative should go to buses near the battery and from there solar, shore power charger, alternator B+, etc are connected with appropriate fusing.
 

ken morgan

Solar Enthusiast
There should be a minimum number of wires on a battery. Other than any cables linking batteries in either series or parallel there should be only one positive and one negative wire on a battery or battery bank - plus a temp sensor if there is one. The main positive and negative should go to buses near the battery and from there solar, shore power charger, alternator B+, etc are connected with appropriate fusing.
so how do you figure in BMS's and or active balancers? IE: there are no absolutes in life...even my statement denying them.
 

mitiempo

Solar Enthusiast
so how do you figure in BMS's and or active balancers? IE: there are no absolutes in life...even my statement denying them.
My post was aimed at the original poster with Fla batteries.

Sense wires, whether for a BMS or temp sensors definitely have to be on the posts if the technology calls for it. BMS wires are typically tiny and act as their own fuses.
 
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