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Author Topic: Why Going to Float is NOT Full  (Read 2905 times)

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Stu Jackson

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Why Going to Float is NOT Full
« on: September 03, 2014, 06:09:26 PM »

Thanks, again to Maine Sail

Full is when the battery gets to 2% of its amp hour rating.
Actually 2% or less AT ABSORPTION VOLTAGE/14.4V +

AT ABSORPTION VOLTAGE is the part everyone tends to forget. Just because you are in float does not mean the battery actually got full. There are far too many dumb "smart" controllers, chargers, regulators that use simple egg timer programs that may NOT match your bank for the proper transition to float from absorption...

Less than 2% AT FLOAT voltage is not always full unless it previously attained less than 2% at 14.4V +........

It should also be noted that 2% is not technically full for many banks but is rather "cruiser full", which means close enough to deem it full.

[added to Electrical 101]
Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

"There is no problem so great that it can't be solved."


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Re: Why Going to Float is NOT Full
« Reply #1 on: September 04, 2014, 11:45:18 AM »


I finally made a video of how to perform a "known full" reset.....
-Maine Sail
Casco Bay, ME
Boat - CS-36T
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