I have 5 year old Rolls. Did an SP gravity test and found one of the 8 volt batteries has two cells that are at the red marks. All other cells are low green or high white marks. Anything I can do to bring the red ones back?
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Thread: Rolls battery maintenance
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06-23-2017 09:40 AM #1Senior Member
- Join Date
- Apr 2005
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- 208
Rolls battery maintenance
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Re: Rolls battery maintenance
Call the Rolls tech rep, Steve Higgins. 206-790-5840. He's in the Pacific time zone.
Greg Harrington
43 DCFB 1977 w/Cummins 903 M1 (340HP)
Hull #454
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Re: Rolls battery maintenance
Can't better the reply already given but in the interest of conversation, according to the Battery University at least that one battery is history? " Experts recommend equalizing services once a month to once or twice a year. A better method is to apply a fully saturated charge and then compare the specific gravity readings (SG) on the individual cells of a flooded lead acid battery with a hydrometer. Only apply equalization if the SG difference between the cells is 0.030." Best wishes Craig
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06-24-2017 10:18 AM #4
Re: Rolls battery maintenance
The rolls site has very specific instructions on battery care and maintenance. http://rollsbattery.com/technical-resources/
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Re: Rolls battery maintenance
I run the equalize charge on my Rolls once or twice per season. In the past two years, I have also been worried about them getting to their end of life. Every time I equalize, I seem to renew them for another 6 months or so.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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06-28-2017 04:40 PM #6Senior Member
- Join Date
- Oct 2010
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- 198
Re: Rolls battery maintenance
Hi SKYCHENEY i have the Rolls batteries and would like to know how i EQUALIZE them i have never done that that i know of....they are my house batteries ...i have owned the boat for over 3 yrs and they came with the boat i don't know how old they are....they are my house bank.... or if the PO ever did that
Joe
1981 56' MY
Lake Gloria II
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06-28-2017 08:21 PM #7Senior Member
- Join Date
- Jun 2007
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- 4,974
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Re: Rolls battery maintenance
Most smart chargers have an equalize function. My Outback will take them up to 40v for 2 hours to boil the sulfate off of the plates.
If you don't have a smart charger, you can use a 12v portable charger on an 8v battery. Call Rolls and they will tell you how to monitor that. You will need to test the specific gravity of each cell to determine when the equalize is complete if you use that method.Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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Re: Rolls battery maintenance
I think you can, if you have a dumb charger, put it in manual and monitor. Google Deka battery maintenance for their procedure if you have them.
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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06-29-2017 09:44 PM #10Senior Member
- Join Date
- Oct 2010
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- 198