Voltage Drop Through ANL Fuse

illridge

CarAudio.com Recruit
28
3
usa
Been trying to track down the cause of my voltage drop from alternator to lifepo bank in the rear.....

Tried running another ground to body in the rear.
Tried running 0 ga direct from alt to rear bank.
Tried unhooking from battery (AGM).
Nothing worked.

Finally thought about measuring voltage across the anl fuse holder right next to alt.
Damn thing had about a .4v drop!

I have a 250amp circuit breaker near the rear bank anyway. Fuse prolly redundant. Whatever---I got rid of it. Voltage holding 14 -14.6 at the rear bank! was 13.5 -14 before.

Great. Now my truck sits at 13.5/6 with the car off. And I think it'll stay in the 13's car idling and banging pretty damn hard on the bass.
 

hispls

CarAudio.com Veteran
5,000+ posts
10+ year member
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Central Maine
Fuse prolly redundant.
Fusing on both sides will prevent the wire from burning your car to the ground should it become damaged and short anywhere between those two fuses.

Speaking of, you're lucky you didn't burn up that fuse holder if you were in a condition where it had that much resistance. That's the sort of thing that leads to the pics you see sometimes of those things completely melted.
 

illridge

CarAudio.com Recruit
28
3
usa
  • Thread Starter Thread Starter
  • #3
Yeah at 200amps that is 100watts of heat dissapated at the holder.
Strangely, the wires, connectors or plastic showed no signs of melting or high heat.
I'm fairly adept at electrical/ mechanical trades.....
But it wouldn't be the first time I've burned something down or blow something up.
46728
 

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