Like all semiconductors, photovoltaic cells are sensitive to temperature. Under real operating conditions the temperature of cells increases with environment, shades or local defects (hot spots) and electrical effects. This increase in temperature causes a decrease in the electrical parameters of solar cells, which makes the electrical power and efficiency of cell are reduced, and also affect the average life of device. Photovoltaic cells have yields between 15% and 25% but efficiency decreases with increasing temperature up to 0.3% per degree centigrade. In practical terms the thermal part of solar radiation can increase the temperature inside the cell, and in turn decrease the yield to unsustainable values. The objective of this project is the application of the Peltier effect to reduce the impact of temperature on the efficiency of photovoltaic cells under operating conditions. For this reason, in this work an alternative was developed to find the suitable temperature for the photovoltaic cell to reach and maintain its highest efficiency. For this, a temperature control based on thermoelectric cells or Peltier effect is used. With the results optimal operating temperatures of the photovoltaic cell are proposed that do not impact the power of the cell. The micro controller displays the solar panel voltage and temperature on LCD. We are connecting peltier plate through switch. Microcontroller will continuously reds the data from solar and temperature sensors. If the temperature value crosses the set limit, microcontroller will activate the buzzer then user need to switch on the peltier plate to control the temperature. Thermo electric plate works with peltier effect, on applying DC, the array of pellet having positive and negative charge carriers absorb heat energy from one substrate and eventually release it to the substrate at opposite side. In this process, cold surface appeared due to absorption of heat energy. This absorbed heat energy is being released to the opposite surface, becomes hot. Exhaust fan is attached to the system to spread the cooling to the surroundings.      

 The objectives of the project include:  

1. Display the solar voltage and temperature on LCD.
2. Using Peltier effect to control the solar temperature.
3. High temperature alerts using buzzer.

  The project provides us exposure on:

1. Thermo electric plates.
2. solar panel working.

  The major building blocks of this project are:  

1. PIC Micro controller.
2. Solar Panel.
3. Rechargeable Battery.
4. DS18B20 Temperature sensor.
5. Voltage sensor.
6. Buzzer.
7. Lm2596 dc-dc Buck converter.
8. Charging circuit.
9. LCD display.
10. Switch.

    Charging circuit:   Block diagram: video: