Pulse Width Modulation,

Pulse Width Modulation, it reduces the burden to the battery by gradually reducing the power supply to the battery without over charging.

Solar Charger is a device which converts existing home UPS in to solar Compatible by Charging batteries from solar PV Panels and having required Automation to utilize the Solar Power once the batteries are fully charged and solar is still available. Once the above condition is met Solar Charger automatically cuts off the mains supply to the existing Home UPS and makes it works on Inverter mode to supply AC power to the loads from DC bus of the UPS and the solar charger will supply DC power from panel to DC bus. So Dc power from PV panel is directly supplied to the loads once Batteries are full.