Luminous Power Technologies [P] Ltd. Offers Pulse Width Modulation - PWM Charge Controller. Luminous Power Technologies [P] Ltd. Supplies power products for home and commercial applications. Pulse Width Modulation - PWM Charge Controller is the most effective means to achieve constant voltage battery charging by switching the solar system controller`s power devices. Pulse Width Modulation - PWM Charge Controller is p-provided with the current from the solar array tapers according to the battery`s condition and recharging needs. It can double the life of the battery.