12v system issues

[Kevin D Pem]

If the batteries were so bad that the lights did not even work, it would be killing the ability of the converter to supply power when on shore power even. They can run the rig for the most part on their own, but add dead batteries and they will not power slides and such and many times the lights are dim.

So you have never had batteries that were fully charged, but could not supply a reasonable load!!! Amazing!!! That is how batteries on constant charge give up the ghost in most off grid systems.

They don't put a load on the converter/charger, they just won't give up their charge.

 

[TheLooks]

That would be a dead battery.

 

[TheLooks]

I had one last week that was failing faster the more 12v loads were activated. I pulled the battery leads and tested it a 6.7 volts. Which came first? The failed battery or failed converter? Both were ruined.

 

[Kevin D Pem]

I had one last week that was failing faster the more 12v loads were activated. I pulled the battery leads and tested it a 6.7 volts. Which came first? The failed battery or failed converter? Both were ruined.

Guess that would depend on which one failed first!!!

If the battery just would not give up the charge, the converter would not be guaranteed to fail. If however the battery puts a load on the converter, both could be bad, and likely the battery would have failed first.
If the converter failed first and the owner didn't abuse the battery then the battery may be recoverable.