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Old 01-01-2020, 10:26 AM   #21
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 12,678
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
my system voltage in the bus is typically only 13.6 - 13.8. so do I need some type of device that steps up the voltage? im assuming my charge controller doesnt step up from the input voltage

do I want to charge at the absorption voltage of 14.7?


-Christopher
cadillackid is offline   Reply With Quote
Old 01-01-2020, 11:14 AM   #22
Bus Crazy
 
Join Date: Nov 2016
Posts: 1,494
Each battery has a specific charge profile, often expressed as a voltage range.

Either A find a battery whose profile matches the output of your charge sources, or

B make sure your sources match the needs of your chosen battery.

In either case only consider a proper, quality true deep cycling battery.

For option B, a DC-DC charger like Sterling BB series will accept alternator or solar output that is not suitable, and let you adjust the voltage to one that is.

Or with that CTEK you need to use option A since it is not adjustable.
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