Walk od Shame. Long!
Confession is good for the soul and I am confessing, I am taking that dreaded “Walk of Shame”. When we bought our Adventurer I was surprised that the batteries were not holding a charge well, they ...
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Kindof, maybe, possibly, related-to ... the same thing happened to us on a trip last year. :S
I have two fairly new AGM batteries in our RV. But the two cabled together in parallel weren't "acting right" ... the voltage was sinking too fast with use.
I opened the battery box, scratched my head, and checked the brass connectors and stainless steel bolts & nuts around the connectors. Everything looked OK. Then I checked terminal voltages of each battery - they read different - which is impossible with two batteries wired together in solid parallel!
Hmmmm ... then I noticed and remembered the little brass/plastic lug-box that I had installed inline in the negative cable between the two batteries. Ahahhhh ... a 50 amp fuse in that little box had blown I don't know when and I had forgotten that I had installed it as a safety measure in case one of the batteries ever suffered a catastrophic internal short. During normal use I didn't think more than 50 amps would ever flow BETWEEN the batteries - more than 50 amps out of the set of two in parallel, yes - but not a 50 amp differential current flow between them!
Now the two batteries are directly cabled together with no fuse - I hope that this never comes back to bite me. :(
I have two fairly new AGM batteries in our RV. But the two cabled together in parallel weren't "acting right" ... the voltage was sinking too fast with use.
I opened the battery box, scratched my head, and checked the brass connectors and stainless steel bolts & nuts around the connectors. Everything looked OK. Then I checked terminal voltages of each battery - they read different - which is impossible with two batteries wired together in solid parallel!
Hmmmm ... then I noticed and remembered the little brass/plastic lug-box that I had installed inline in the negative cable between the two batteries. Ahahhhh ... a 50 amp fuse in that little box had blown I don't know when and I had forgotten that I had installed it as a safety measure in case one of the batteries ever suffered a catastrophic internal short. During normal use I didn't think more than 50 amps would ever flow BETWEEN the batteries - more than 50 amps out of the set of two in parallel, yes - but not a 50 amp differential current flow between them!
Now the two batteries are directly cabled together with no fuse - I hope that this never comes back to bite me. :(
