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This charger features user selectable 2 or 3 stage charging. The charging profile is selected by
moving the slide switch on the front panel left to 3 stage or right for 2 stage charging.
A two-stage charger provides a constant current until the battery reaches its rated capacity
and then switches to a “float” voltage. The current then reduces as necessary to maintain
the battery at the float voltage. The charger can be connected to the battery indefinitely and
will provide the appropriate profile. A two-stage charger is recommended in most instances
since it is the most versatile and can be permanently connected to attenuate the characteristic
discharge of unused batteries. A load can be put on the battery or batteries without altering
its ability to keep the battery at optimal charge.
100%
75%
50%
25%
0%
Bulk
(Constant Current)
Float
(Constant Volts)
Time
Two Stage Charge
Volts
Amps
100%
75%
50%
25%
0%
Bulk
(Constant Current)
Absorption
(Constant Volts)
Float
(Constant Volts)
Time
Three Stage Charge
Volts
Amps
2 or 3 Stage Charging
OUTPUT ADJUSTMENT
The unit has an adjustment potentiometer to allow up to ± 1.0V adjustment of the output
voltage. This potentiometer is accessed through a small hole in the front panel of the Battery
Charger. As shipped from the factory, the unit is preset for a voltage of 13.6, 27.2, 36.3 or
54.4VDC. If you wish to adjust this voltage, first locate the output adjustment potentiometer
access hole next to the diagnostic LED’s on the front panel. Reach in with a very small flat
blade screwdriver to rotate the potentiometer. Clockwise increases the output voltage and
counter clockwise decreases it. When you are done, replace the cover plate and securely
tighten the screws.
