Specialty Concepts SC2 - Manual (Page 6)

11. BATTERY VOLTAGE SENSE CONNECTIONS: - The factory has installed two jumpers onto
the terminal block. They connect the "BATTERY VOLTAGE SENSE" (positive and negative)
terminal to their respective "BATTERY" terminals. These jumpers should remain in place if
the SC2 is located within 5-10 feet of the batteries and if large enough wire is used to
minimize voltage drops to less than 2%.
If the SC2 is at a greater distance from the batteries and/or if the voltage drop in the
battery wires exceeds 2%, then the jumpers should be removed and replaced with another
circuit running directly to the battery terminals. This is a low current, voltage sensing circuit
that can be wired in 16 AWG wire. Proper over-current protection should be added on the
positive side. This connection will allow the SC2 to accurately measure battery voltage.
12. INSTALL FUSING AS NEEDED: - Add circuit protection where needed. A 30 amp fuse
(or 50 amp with P-Option) should be installed on the Battery (+) run of the SC2.
13. INSTALL TEMPERATURE COMPENSATION (option A): - If included. Refer to OPTIONS
section below.
14. MAKE ADJUSTMENT TO VOLTAGE SET-POINT (option T): - If included and if needed.
Refer to OPTIONS section below.
15. RECONNECT BATTERY AND ARRAY POWER
POWER CONNECT SEQUENCE
It is recommended that the power is supplied to the system using this
sequence. Some of the circuits within the SC2 must be reset to their "start
state" and this is automatically accomplished if the power is supplied in this
order. If the order is not followed, a period of up to 24 hours may have to
elapse before the electronics are fully reset.
Step 1 Battery (-) (terminal # 7): To Battery (-)
Step 2 Battery (+)( # 2): To Battery (+)
Step 3 Array (-)( # 6): To Solar Panel Array (-)
Step 4 Array (+)( # 3): To Solar Panel Array (+)
Optional (see “COMPLETE LOAD CONNECTIONS” above)
Step 5
Load Connect (-)( # 5): To Load (-)
Step 6 Load Connect (+)( # 4): To Load (+)
If Needed (see “BATTERY VOLTAGE SENSE CONNECTIONS” above)
Step 7
Battery Sense(-) ( # 8): To Battery (-). (Remove #7-#8 jumper)
Step 8 Battery Sense(+)( # 1): To Battery (+) (Remove #1-#2 jumper)