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Old 06-17-2017, 12:19 AM   #15
Beau388
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 234
Good news is AGM batteries only self-discharge at 1% per month as opposed to flooded batteries self discharge rate is 1% per day. Charging is a problem though -

"AGM batteries are sensitive to overcharging. A charge to 2.40V/cell (and higher) is fine; however, the float charge should be reduced to between 2.25 and 2.30V/cell (summer temperatures may require "lower voltages). Automotive charging systems for flooded lead acid often have a fixed float voltage setting of 14.40V (2.40V/cell); a direct replacement with a sealed unit could overcharge the battery on a long drive.

AGM and other sealed batteries do not like heat and should be installed away from the engine compartment. Manufacturers recommend halting charge if the battery core reaches 49C (120F).
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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