Battery Question

[txav8r]

Yes, it was ongoing with AGM batteries using a guest dual bank charger and finding a battery hot and at 5ish V. Read the whole thread again.

 

[txav8r]

The question is...why did the fuse blow? And why is the battery dead...again?

 

[davel501]

Fuse was blown since sometime last season as near as I can tell. I probably did something wrong when I was messing with the wiring at some point. That probably led to the 5v battery that got hot on the charger at AutoZone. Battery probably was fine and probably would have taken a charge if the juice had actually made it all the way there.

The problem as I see it is the Guest charger showing everything was fine on the status lights even when it was not. I pulled the fuse from the start battery feed yesterday and put it in the house battery feed to get the battery charging until I could run to town to buy a fuse. The light for the start battery stayed green even though I know it was not connected. The house battery did go to red with the connections actually made though.

 

[Ronnie]

That last bit about frying stators stuck in my mind from other posts. I figured I paid for the expensive battery with the good warranty so I should take advantage of it. Took the battery back to Napa today and they will have a brand new one for me tomorrow morning.

That's what I would have done. Why experiment trying to trouble shoot and come up with a solution first? I'm not an electrical engineer, I just want to go boating.Replace the battery while most of the warranty is intact and keep an eye out afterwards to see if the issue has been resolved, if not you know it's not your battery and you have just renewed the warranty for it so you could replace it again less expensively if needed after you address the root cause of the problem.

 

[Island Jay]

I would contact Guest about this. Ask if they have a trouble shooting guide that tells you with certainty that there is a problem with the charger or not. Sometimes the guides are in the manual.