Full Product Manual

4
General Information
The PWM 30ACC-ViewStar is an advanced controller for off-grid solar applications. This high
performance PWM charging process is optimized for a long battery life and improved system
performance. It can be used for 12V or 24V battery bank. The control is embedded with self-
diagnostics and electronic protection functions that prevent damages from installation mistakes
or system faults.
Key Features
 Automatic recognition for 12V or 24V battery banks.
 Dot-matrix, backlit LCD for displaying operating information and data.
 Unique dual-timer for the controller’s load terminal.
 Full control of parameter settings that can be adjusted.
 Sealed, Gel, and Flooded battery option.
 4 Stage charging: Bulk, Boost. Float, and Equalization
 Temperature compensation and correcting the charging and discharging parameters
automatically, improving battery lifetime.
 RJ45 interface for use with the remote meter MT-50, which conveniently checks the
operating parameters of the charge controller
 Protection against: overcharging, over-discharging, overload, short-circuit, and reverse
polarity.
 Negative ground controller.
PWM Technology
The PWM 30ACC-ViewStar utilizes Pulse Width Modulation (PWM) technology for battery
charging. Battery charging is a current based process so controlling the current will control the
battery voltage. For the most accurate return of capacity, and for the prevention of excessive
gassing pressure, the battery is required to be controlled by specified voltage regulation set points
for Absorption, Float, and Equalization charging stages. The charge controller uses automatic
duty cycle conversion, creating pulses of current to charge the battery. The duty cycle is
proportional to the difference between the sensed battery voltage and the specified voltage
regulation set point. Once the battery reached the specified voltage range, pulse current charging
mode allows the battery to react and allows for an acceptable rate of charge for the battery level.