Operation; Pwm Technology; Battery Charging Information - WESTECH VS Series Instruction Manual

4 Operation

4.1 PWM Technology (Series Pulse Width Modulation)
The controller adopts the advanced series pulse width modulation (PWM) charging mode.
With range of 0-100%, it can charge the battery quickly and stably under any condition of
solar photovoltaic system.
PWM charging mode use automatic conversion duty ratio pulses current to charge the
battery. The battery can be fully charged safety and rapidly with the pulse current.
Intermissions make some oxygen and hydrogen generated by chemical reaction
chemically combined again and absorbed. It can eliminate concentration polarization and
ohm polarization naturally and reduce the internal pressure of the battery so that the
battery can absorb more power. Pulse current charging mode makes battery have more
time to react, which reduces the gassing volume and makes battery improve the
acceptance rate of charging current.

4.2 Battery Charging Information

·Bulk Charge
In this stage, the battery voltage has not yet reached boost voltage and 100% of available
solar power is used to charge the battery.
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