CirKits.com SCC3 Features and Specifications

• Features
  • Efficient design is suitable for use with low to medium power solar panels and solar arrays.
  • Will work with most rechargeable battery types: Lead Acid (wet or gell), NiCd, NiMH and NiFe.
  • Compatible with monocrystaline, polycrystaline and amorphous PV panels.
  • Common Negative Ground for Solar Panel and Battery.
  • Reliable solid-state circuitry, no power hungry relay with limited-life contacts.
  • Built in fuse for short circuit protection, load circuitry requires its own fused disconnect.
  • Capable of withstanding reverse battery and reverse PV connection.
  • Charging method: Full-on below float point, chopper-stabilized PWM at float point.
  • Temperature compensated float voltage set point for optimal charging at different temperatures.
  • Radio quiet, can be used with sensitive radio receivers.
  • High voltage transient protection on solar panel input for limited lightning protection.
  • Simple 4 screw connector will accept spade lugs or wires for attaching a battery and PV panel.
  • Multiple SCC3 units can be used to connect several (<20 Amp@12Vnom) solar arrays to one battery.

• Controls and Indicators
  • Red/Green LED for Charge/Float state indication.
  • Equalize switch for periodic maintenance overcharging.
  • Float voltage adjustment trimmer pot.

• Specifications
  • Nominal Battery Voltage: 12V.
  • Solar Charging Current: 0 to 20 Amps continuous.
  • Recommended Battery Capacity: 0.5 to 400 Amp Hours.
  • Photovoltaic Panel Voltage Ratings: 12V Nominal (16-25V Open Circuit Voltage, 36 cell typical).
  • Absolute maximum PV input voltage: 26VDC
  • Photovoltaic Panel Power Ratings: 1W to 240W (90ma - 20A Short Circuit Current).
  • Voltage Drop During Charging: 0.5V @ 10A, 1V @ 20A.
  • Float Voltage Adjustment Range: 13V-15V (range can be altered).
  • Float Voltage Variation during charging: +/- 0.03V
  • Equalize Mode Voltage Increase: 1.5 Volts.
  • Charge Controller Temperature Compensation: -7.5mV/Degree C.
  • Night Time Battery Current Drain: 0.8 - 1.8ma.
  • Fuse Type: 20 Amp ATO automotive fuse.
  • Board Dimensions: 3.5" wide by 3.0" deep by 0.95" tall.
  • Fits into a standard 4" X 4" electrical utility box, can be mounted on the cover plate.
  • Board Mounts: 3X 4-40 screws on 1/4" spacers.
  • Assembled Weight: approximately 60 grams (2oz).