Specialty Concepts SC2 - Manual (Page 7)

16. OPERATION: - Operation of the charge controller is now fully automatic. If the battery
voltage is below the Full Charge Termination Set-point (see SPECIFICATIONS) and power is
available from the array and the Power Connect Sequence (above) was followed, the SC2
should start up charging.
Duing float charging (12 or 24 volt units) it is normal for the unit to feel warm. This is due to
power dissipation of the voltage regulated float circuit.
17. CHECK FOR VOLTAGE DROP (OPTIONAL): - Once the system is installed and operational,
a check on the battery connection is recommended. A poor battery connection will result in a
voltage loss that will cause the batteries to be under-charged and/or result in excessive heat
generated at the location of poor connection (wire connection or terminal block). A voltage
multi-meter is required and the SC2 must be in Full Charge mode with maximum expected
charge current.
First, note the voltage at the battery terminals. Select the positive and negative terminals that
are used for the SC2 connection. Then note the voltage at the SC2 terminals for BATT (+) and
BATT (-). The difference in voltage should be no more than
¼ volt for a 12 volt system (½ volt
for 24 volt system). If the voltage drop is more, suspect crimp connections that have not been
soldered or loose terminals. If no location of voltage drop is found, consider using larger wires
for your run or run a separate wire for the Battery Sense connection. See “BATTERY
VOLTAGE SENSE CONNECTION” (above).