Samlex Solar SCC-30AB - Introduction and Features

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IntroductIon & features
The SCC-30AB is a Series Type of PWM (Pulse Width Modulation) Charge Controller.
It is based on an advanced design using a microcontroller for digital accuracy and fully
automatic operation. It can be used for 12V or 24V systems for solar charging . The
PWM battery charging has been optimized for longer battery life. The unit is designed
for user-friendly operation. Please take the time to read this Owner’s Manual and
follow the instructions step by step to help you make full use of the charging system.
Features
• Advanced microcontroller based, high performance design for digital accuracy and fully
automatic and intelligent operation
• Dual voltage capability – can be used with 12 V / 24 V Solar Systems
• 30 A charging capacity – enables use of up to 360 W of 12 V or 720 Watts of 24 V Solar
Panels
• Series Mode PWM (Pulse Width Modulation) charging design for low loss higher efciency
charging and longer battery life
• 4 Stages of charging for 100% return of capacity and long battery life – Bulk, Absorption,
Float and Equalization Stages
• Choice of 8 sets of Absorption / Float / Equalization voltage settings to enable complete and
safe charging of a wide range of Lead Acid / Ni-Cd Batteries
• Convenient 2 X 16 character LCD Display with backlight for display of operating information
and data. Additional LED indication for displaying the charging stages
• Optional remote Battery Temperature Sensor (BTS) Model DC-BTS-A-C for temperature
compensation to ensure improved charging of batteries that experience wider temperature
variations during the year
• MOSFET based reverse current blocking for night-time battery discharge prevention. This
allows much lower losses as compared to Diode based blocking
• Specially designed for RVs, boats and trucks – allows convenient and aesthetic ush
mounting on walls / panels
• Industry leading warranty
Requirements of Battery Charging in PV Systems
Batteries in PV Systems are commonly subject to abusive conditions that are generally
due to:
• Under charging due to low sun peak hours
• Excessive charging in high sun peak hours
• Inappropriate or ineffective charge control for the battery technology
The individual or combined effects of sun peak hour changes, poor charge control
and the daily load changes can be potentially damaging to the battery. Cheaper
charge control strategies such as simple on/off PV array shedding (Non PWM control)
will generally provide the battery with sufcient charging current to complete the
Bulk Charge Phase which will return the battery to 80% State of Charge. After
the Bulk Charge Phase, the Taper or Absorption Charge Phase is very important in
preventing stratication, hard sulfation and pre-mature capacity loss.