Sounds like the batteries are sulfating. IMO you really should consider a beefier three stage charger than a trickle charger. I'm using a Zivan NG-1 for bulk charging and sometimes a DUAL PRO 4 to top the individual AGM batteries off. My batteries are still going strong after five years. Perhaps a little more info on the batteries (type and size) and brand and specs of your charger would help the battery gurus here to give you more advice.
Capt. MIke
http://biankablog.blogspot.com
From: "magicflyer@sbcglobal.net" <potedenuni@gmail.com>
To: electricboats@yahoogroups.com
Sent: Saturday, April 20, 2013 12:29 PM
Subject: [Electric Boats] Battery issues
I have been experiencing battery issues. I have a 48v system (4x12 wet cell) on a fairly new trickle charger. After only a couple of months, all four batteries had to be replaced...wouldn't take or hold a charge. The new batteries have been in only about 6 weeks and already I am only able to get to 47.5v. I fear the new batteries are already shot. I have been having a problem with the shore power breaker tripping which leaves the boat with no power for several days at a time, but can't see how that would be damaging the batteries. Can anyone give me any pointers on common problems that might be damaging the cells?
Thank you!
Thank you!
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