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 3 bank charger jumper
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Author Previous Topic: XANTREX FREEDOM 3000 INVERTER Topic Next Topic: Fuel Gauge  


RO# 12212

Posted - Jul 31 2012 :  10:54:59  Show Profile  Reply with Quote
Came across something interesting yesterday... I had to replace a 4D AGM that was only 3 years old, not holding charge,dropping back to 10.7 v as soon as the charger was turned off, and pretty warm to the touch

It's one if 2 batteries (4Ds) used for only for generator starting (2 generators) and some light house duties (only 2 VHFs and 5 stereos, all but one being rarely used)

Charger is a smart 3 stage Pro Mariner (Protech 4-1230) which afaik is original to the boat. I pulled the manual and found that while the battery type switch was set correctly,two other things were incorrect:

Dip switches for absorption time were set for one hour whereas the manual recommends 4 hours for 4Ds

Missing jumper between one of the used output terminals to the third and unused terminal

I wonder if this would explain why those batteries don't seem to last more than 3 to 4 years.

Unfortunately, until recently there were no visible volt meter for the 12v system so I had no mean to check and keep track of voltages. It s a pet peeve of mine... Hiding voltmeters, amp meters, bilge and sump pump lights behind solid cabinetry is plain stupid!

1970 Hatteras 53 MY
26' Starfish sloop
12' Westphal Catboat
16' Hobie Cat
13' Sandbarhopper

Homeport: Miami, FL


RO# 31163

Posted - Jul 31 2012 :  12:16:50  Show Profile  Reply with Quote
Your answer is "yes". I had some wiring and battery work done this year and the electrician found the exact same problem with my ProMariner. He replaced the jumper and now all works well.


Key West 196 Bay Reef, 150 Yamaha
USCG 50 Ton MMC, Tow Assist Endorsement
SSI Certified Instructor Level 1

Homeport: Palm Coast, FL Go to Top of Page
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