Instruction Manual

Configuring Battery Characteristics and Battery Charging
975-0400-01-01 Revision H 3–11
This manual is for use by qualified personnel only.
If a BTS is installed, the charge controlling process will be automatically adjusted
for the battery temperature. The solar charge controller uses the following
coefficients to adjust the charging voltage:
• Flooded Lead-Acid and Gel-Type Batteries (12 V nominal):
-27 mV per degree Celsius
• Absorbed Glass Mat (AGM)-Type Batteries (12 V nominal):
-21 mV per degree Celsius
If using a BTS, when the battery temperature drops below 77°F (25°C), the
regulation voltage setting automatically increases. When the temperature rises
above 77°F (25°C) the regulation battery voltage setting automatically
decreases. The temperature range where compensation is applied is between
0°C and 50°C. Outside of this temperature range, the compensation value is
clamped at the corresponding value for either 0°C or 50°C.
If a BTS is not installed, you can configure the solar charge controller to use one
of three temperature compensated charge settings:
• Cold—10°C (50°F)
• Warm—25°C (77°F)
• Hot—40°C (04°F)
If significant seasonal variations are common in your area, you will have to
change the settings during the year to ensure optimal battery charging.