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Configuration
3–10
975-0400-01-01
Battery Temperature Compensation
When battery charging voltages are compensated based on temperature, the
charge voltage will vary depending on the temperature around the batteries.
Temperature compensation can be accomplished automatically by using a BTS.
The BTS attaches directly to the side of one of the batteries in the bank and
provides precise battery temperature information.
See “Installing the Battery Temperature Sensor” on page 2–21 for detailed
instructions on how and where to install the BTS.
If a BTS is installed, the charge controlling process will be automatically adjusted
for the battery temperature. The XW SCC 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.
If a BTS is not installed, you can configure the XW SCC to use one of three
temperature compensated charge settings:
•
Cold—50 °F (10 °C)
•
Warm—77 °F (25 °C)
•
Hot—104 °F (40 °C)
If significant seasonal variations are common in your area, you will have to
change the settings during the year to ensure optimal battery charging.
Summary of Contents for XW-MPPT60-150
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