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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: 240
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 49°C (120°F).
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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