Uninterruptible Power Supply is critical to many sectors of the economy such as operation of units in hospitals, banking operations, information technology systems, etc. and generally, a constant power supply is cardinal to rapid economic growth and sustainable development. In developing countries in particular, where power failure is a regular feature, there is great need for improved UPS systems. A power supply system that incorporates a renewable source of energy as contained in this work provides a viable option to overcome the problem of disruption of work in progress due to power failure.
Solar energy is converted to electrical energy by photo-voltaic(PV) cells. This energy is stored in batteries during day time for the utilization purpose whenever required. This project is designed to use solar energy for household loads using an inverer. A solar inverter, or PV inverter, converts the direct current (DC) output of a photovoltaic solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-line electrical network.
In this project, the solar energy is stored in the battery from Photo-Voltaic cells. This stored energy of the battery is converted to AC supply of 50Hz frequency using PWM inverter IC with MOSFET gate driver IC to the driver MOSFET bridge and step-up the voltage by a transformer ,all in off line network only but not grid tie type.
In this rechargeable battery of 12V 1.3Ah is used. The solar panel 12V 5W is used
Hardware :
• 12V 1.3Ah Rechargeable Battery
• 12V 5W Solar Panel
• SG3525 PWM Inverter IC
• MOSFETS (IRFZ44)
• Transformer (12-0-12V)
• Lamp