Specialty Concepts SC1 - Manual (Page 3)

R E L A T E D S Y S T E M E Q U I P M E N T
The SC1 is an integral part of a solar electric power system that includes a PV solar array, a
battery and a load. These items should be installed in accordance with the National Electrical
Code, and with the instructions provided by the equipment supplier.
SOLAR ARRAY PANELS: The SC1 is compatible with all makes and models of PV panels. The
open circuit voltage of the array should not exceed the maximum open circuit voltage of the
SC1(See SPECIFICATIONS: “Array Voltage, Max Voc”) and the maximum power current of
the panels should not exceed 30 amps (or 50 amps with P-Option).
HIGHER CHARGING CURRENTS: For arrays exceeding the maximum power current of the
SC1, the array can be divided into smaller parallel sub-arrays. A SC1 can be wired in parallel
to each sub-array, provided the sub-arrays do not exceed the rating of the individual SC1.
BATTERIES: The standard SC1 is designed to be used with the most common lead-acid
batteries. These are wet cell batteries using pure lead, lead antinomy and/or lead calcium
grids. Adjustments in voltage set-points may be made on SC1 models with the adjustable set-
point option (Option T). For sealed, maintenance free batteries, or vented pocket plate nickel-
cadmium batteries, the charging set-points should be adjusted to maximize performance and
battery life. For sealed, maintenance free batteries or nickel cadmium batteries, consult the
battery manufacturer for recommended set-points and refer to Table 1 (OPTIONS section) for
appropriate settings.
LOADS: The load is considered the item or equipment that the PV system is powering. System
loads such as lights, radios, DC/AC inverters, etc. must be rated for the proper DC input
voltage. DC loads not exceeding the rated SC1 load current (See SPECIFICATIONS “Load
Current, Continuous”) can be connected to the load terminals of the SC1 and they will
automatically be disconnected in the event of a low-voltage condition. Higher current, or
inductive loads such as pumps, motors or inverters should be connected directly to the
battery, using properly rated over-current protection devices (fuses or circuit breakers).
OTHER CHARGING SOURCES: Do not use the SC1 to regulate a power source other than a
photovoltaic array, such as a hydro or wind generator/alternator or an AC battery charger.
This could result in damage to the SC1 and/or the generating equipment. Connect other
charging sources with their own regulation devices directly to the battery, using properly rated
over-current protection devices.
The SC1 and solar panel can remain connected to a battery being charged by other sources,
(alternator, battery charger, etc.) without damage to the controller or solar panel.