Specialty Concepts SC3/20 - Manual

S
PECIALTY
C
ONCEPTS
M
ark
III
/
20
(
SC3
/
20
)
Photovoltaic Battery Charge Controller
Installation & Operation Manual
S
PECIALTY
C
ONCEPTS,
I
NC.
8954 Mason Ave.
Chatsworth, Ca 91311 USA
Copyright 5 / 1997 Specialty Concepts, Inc.
G E N E R A L D E S C R I P T I O N
The Specialty Concepts Mark III/20 (SC3/20) is a battery charge controller and system monitoring
unit designed for use in mobile or stationary photovoltaic (PV) energy systems. This controller is
designed to be used with standard lead acid batteries that are normally supplied for use in stand
alone or mobile applications.
The SC3/20 uses a solid state pulse-type charge controller to safely reach and maintain a full
state of charge for the battery. A blocking diode is provided to eliminate losses through the solar
panels (array) at night. A digital meter is included for battery voltage, solar charge current, charge
set-point calibration, and a position for an external shunt (supplied separately) to read an
additional current. The fuse provides over-current and reverse polarity protection. "Charging",
“Charged”, and “Low Voltage” lights indicate battery state. This model is available for 12 volt
systems with charging currents up to 20 amps. The SC3/20 can be mounted flush or an additional
knockout box (4x7 BOX) can be purchased for wall mounting.