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Old 07-16-2012, 08:12 PM   #1
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WestCoastRV'er's Avatar
Join Date: Aug 2010
Location: Canada
Posts: 223
Stepped out and got 2 6V Trojans (T-105)

Purchased 2 T105 Trojan Batteries and wired them in series. The dealer mentioned that I should charge them after each use and if possible charge them at 6V as it will give them a fuller charge.

Last night after using them for 2 days I brought them home and set them up in parallel so I could charge them at 6V using a Canadian Tire charger using the 15AMP setting. After 12 hours I checked on them and they were putting out 6.71V each and were making a boiling sound while on the charger. Doesn't seem right. It looked like the charger was putting out around 10AMPS.

Any suggestions on charging them?


2011 2902ss Rockwood Ultralight
2008 Grand Cherokee 3.0L Diesel (255 hp @ 2900 rpm / 430 lb-ft @ 1,400-2,800 rpm)
3P ProPride Hitch
RV Mods
Wandering RV Life
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Old 07-16-2012, 08:30 PM   #2
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Join Date: Jul 2008
Location: central PA
Posts: 973
sounds like the impedance was too low with the batteries paralleled. you were "boiling" off the fluid.

To charge them, keep them in series. use a quality charger, such as a Progressive Dynamics with the charge wizard. a cheap auto charger will just overcharge them. If you upgrade your converter in your camper to the PD with wizard, it'll take care of the batteries perfectly. You'll still have to check fluid though!

oh, check the fluid often and only add distilled water!
2000 Cherokee 29BH with 6V batteries, LED lights & 400 watts of solar power, flipped axles and raised. 2007 Tundra 5.7L DC-LB with lots of mods. C-co, 8/158th AVN Maint.
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