Here, we have designed the prototype of the Sun-Tracking Solar Panel using Arduino Uno. The servo motors are mounted on the 3D printed rotating fixture to rotate the solar panel.

Nowadays, we can see the use of a solar system is everywhere. The sunlight is a natural and free source of energy. The Sun emits solar radiations or electromagnetic radiations. In the solar energy system, these radiations are used to generate electricity with the help of Photovoltaic cells or Solar cells. In this tutorial, we are going to learn about the prototype of the Sun Tracking Solar Panel Using Arduino.

Before understanding the working and advantages of the Solar Tracker, we need to know why we have built this Solar Tracker.

Need for Solar Tracker

Rotationally every season comes with its translation movements which affect the cycles of day-night and the temperature differences around the world. Electromagnetic radiation depends on these movements. These radiations will change depending on the latitude and the time of the year.

The above image shows the angle of incidence of sun rays at noon and on a horizontal surface in winter and summer. Thus, daily solar orientations vary depending on the latitude and they directly affect the angle of incidence of sun rays. This angle of incidence is a key point in producing solar energy.

Therefore, a Solar Tracking System is essential to know the exact orientation and inclination of our location.

Types of solar tracking system

As per the mode of motions, the solar tracking system is classified into two types,

• Single-axis solar tracking system
• Dual-axis solar tracking system

There are two horizontal axes and one vertical axis for a moving surface. The surface rotates around each axis to get the right angle for receiving the maximum sunlight.

In a Single-axis tracking system, the adjustment of the surface happens around only one axis. And in the dual-axis tracking system, the rotation of the surface happens by rotating around two axes simultaneously

Advantages of solar tracking system

On the same amount of space, solar trackers generate more electricity than a fixed solar system which makes them ideal for optimizing land usage.
There are two kinds of solar trackers, such as single-axis and dual-axis. A suitable solar tracker can be installed according to the Installation size, local weather, degree of latitude and electrical requirements
Solar trackers generate more electricity than their stationary solar system due to direct exposure to solar rays.
Also, the tracker system does not require long term maintenance because of the advancements in technology and reliability of mechatronics.
In certain states, some utilities offer Time of Use (TOU) rate plans for solar power. This utility will purchase the power generated during the peak time of the day at a higher rate. The solar tracking system is used to maximize the energy gains during these peak time periods.

How it will work?

The solar panel uses photovoltaic cells (PV cells). The PV cells detect the light intensity and according to that, the tracker adjusts the direction that a solar panel to the position of the Sun in the sky.

Every time, the tracker adjusts the panel perpendicular to the Sun so more sunlight strikes the solar panel, less light is reflected. Hence, it absorbs more energy which can be converted into power.

In this Prototype, we are using the LDR sensor to detect the light(sun) intensity and servo motors for automatic rotation of the panel using the Arduino microcontroller. Arduino Uno board uses to control the motor as per the output of the LDR sensor. You can use the potentiometer also to operate this panel manually.

.Building a Rotating fixture

In this sun-tracking solar panel using Arduino, we are using 3D printed accessories to make a rotating fixture. Here, we have designed the necessary small parts for the movement. In your project, you can use anything like cardboard, wood, plastic etc to make this fixture.