Solar Power Conditioning Unit (PCU) is an intelligent solar inverter with grid connectivity and battery backup. It works with priority to solar / battery / grid power. This PCU will provide full power from solar panels and will charge the batteries simultaneously keeping the grid off. In case of unavailability/ partial availability of solar power it will transfer full/ partial load to the batteries. If the battery voltage goes below a set level, the PCU will automatically transfer the load to the grid/ DG power and charges simultaneously. Once the batteries are charged to the present level, the PCU will switch off the grid/ DG power from the system and restores it to solar panels. The PCU automatically switches to hybrid (current sharing) mode if the power is low compared to the load requirement.