The main aim of the project is to track the maximum power point of a solar panel under varying meteorological conditions. Every PV panel has an optimum operating point which varies depending on cell temperature, the isolation level and array voltage. So, in order to maximize the PV output power, a maximum power point tracker should be used in PV system. SEPIC converter is one of the buck-boost converters which maintain the output voltage as constant irrespective of the solar isolation level. Solar energy is most sought today in developing countries, the fastest growing segment of the photovoltaics market. People go without electricity as the sun beats down on the land, making solar power the obvious energy choice. "Governments are finding its modular, decentralized character ideal for filling the electric needs of the thousands of remote villages in their countries." It is much more practical than the extension of expensive power lines into remote areas, where people do not have the money to pay for conventional electricity. Solar panel is the fundamental energy conversion component of photovoltaic (PV) systems. Its conversion efficiency depends on many extrinsic factors, such as insolation levels, temperature, and load condition. In this project Micro controller gives the Pulses to the MOSFET’s of the SEPIC converter using PWM technique. Based on the triggering from controller section SEPICconverter can Boost/Buck from Low/High voltages from the solar panel.So that SEPIC converter maintains constant output voltage irrespective of the solar isolation level.LCD is interfaced to the controller section, which can display the voltage levels of the whole system.

Major components presenting this system:

1. Battery
2. Micro controller
3. SEPIC Device
4. LCD

Block Diagram:

video: