3.0 OPERATION
41
©2000 Xantrex Technology Inc.
Front Panel Controls and Indicators (continued)
Battery Charger Rate
The Battery Charger Rate potentiometer sets the maximum charge current supplied to the
battery bank and is also used to regulate constant current in the Bulk Charge Mode. The level
should be adjusted to provide a charge rate less than or equal to the amp-hour capacity of the
battery bank divided by a factor between 3 or 5 (5=gelled batteries and 3=lead-acid batteries).
Example:
1. Inverter DR1512 has a maximum charge rate of 70 amps.
Battery bank amp-hour capacity = 500 amp-hours using gel cell batteries.
Divide the amp-hour capacity by 5 (500/5 = 100).
Set the potentiometer to MAX (70 amps) as it is less than 100.
2. Inverter DR1512 has maximum charge rate of 70 amps.
Battery bank amp/hour capacity is 250 amp-hours using gel cell batteries.
Divide the amp-hour capacity by 5 (250/5 = 50).
Set the potentiometer to approximately 71% (50 amps).
Use the table below to find the approximate setting of the Battery Charge Rate potentiometer.
The settings do not need to be exact, but should be as close as possible to the actual value
required.
NOTE: The potentiometer does not have an arrow to indicate its position. Use a small blade
screwdriver and rotate the control completely CCW to find the start position. Rotate the
potentiometer CW to the desired position (i.e., halfway between the stops for a 50% setting).
Figure 37
Battery Charger Rate Potentiometer (DR1512 values used)
Percent of Potentiometer Rotation
(between stops)
Model
0%
MIN
25% 50% 75%
100%
MAX
DR1512
DR2424
DR3624
0 amps 17.5 amps 35 amps 52.5 amps 70 amps
DR2412
0 amps 30 amps 60 amps 90 amps 120 amps
DR1524
0 amps 8.75 amps 17.5 amps 26.25 amps 35 amps
975-0012-011
Table 8
Approximate Charge Rate Setting/Amperage
0%
(0 amps)
50%
(35 amps)
100%
(70 amps)
Example 1
71% approximately
(50 amps)
Example 2
25%
(17.5 amps)
75%
(52.5 amps)
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