Solar Energy Panels

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Solar Energy

Solar energy is the energy available from the Sun in abundance. This is the source of energy we feel every day and life on earth is possible only because of this form of energy.

Solar Energy

The energy available from the sun can be of two types, viz., heat and light. Both these forms of energy from the Sun are abundant and easily available. Solar energy is so abundant, that we use only a fraction of energy as compared to the energy available from the Sun.

Today, we have devised technology which is getting better day by day and our efficiency of converting solar energy to our use is increasing with this enhancement. We can generate electricity through solar and transport it to far off locations. Or, we can just go, off grid. Now, we can provide electricity in off-grid and remote locations by generating it locally at these locations form this abundant Sun’s energy.

Solar Energy Panels

Solar Energy Panels convert sunlight into electricity. They generate Direct Current (DC) electricity which may or may not be converted to Alternating Current (AC) electricity depending on the end use. This is a simple explanation of solar energy panel working which can be easily understood by anybody.

Solar Energy Panels
Solar Energy Panels at our 20 kW site

It must be noted here that, solar energy panels convert sunlight into electricity and not Sun’s heat into electricity. In fact, with the rise in temperature above that of Standard Test Condition (25 degrees Celsius or 77 degrees Fahrenheit), the efficiency of solar energy panels decreases. So, the solar energy panels starts generating electricity with the sunrise and it continues to generate electricity till the sunset.

Solar Energy Panels Construction

Solar Energy Panels consists of various solar cells arranged in a particular order in series and parallel. These cells are generally made up of silicon doped with thin layers of materials called dopants.

These dopants are applied in thin layers to create a layer of either fewer or more electrons. The side with more electrons will act as negative charge and the side with less electrons will act as positive charge. Generally, a thin layer of phosphorous is added on top of silicon as it brings more electrons and so, acts as a negative charge and a layer of boron is added at the bottom of silicon which has fewer electrons and acts as a positive charge.

Solar Energy Panels Working Principle

Solar Energy Panels work on the principle of Photoelectric Effect. According to this principle, when a light shines on a material, the electrons inside the material gain / absorb energy from photons in light and become high in energy. When this energy becomes higher than the binding energy or band gap energy of the material, electrons escape, or, in other words, electrons get emitted from the material.

Solar Energy Panels being a semiconductor device also works on the principal of p-n junction. When we form layers of phosphorous and boron on silicon, it forms a p-n junction. One side of this junction has more electrons than the other side, which makes current to flow in a particular direction.

Solar Energy Panel Working

 

When not excited by sunlight, electrons from one side find it difficult to go to other side of the junction as more energy is required to counter the opposing electric field.

When solar energy panel is placed in the sunlight, electrons absorb energy from the sunlight. This makes their energy enough to counter the opposing electric field. As a result, electrons flow from one region to the other region across the p-n junction.

This can be seen in the picture on the left. In the presence of sunlight, electrons are moving from left side to the right side. This causes an accumulation of negative charge on the right side and consequently, positive charge on left side. This creates a voltage difference and thus causes the current to flow in the wire from positive side to negative side as shown in the same figure.

This can be seen as similar to the terminals of a battery. The current flows from positive to negative side powering your loads and appliances.

In order to to capture the charge, metal contacts are provided at both positive and negative terminals. They are then connected to wires or cable for the flow of current.

At this point, solar panels are converting sunlight into DC electricity. This can either be converted into AC using an inverter or can be used directly while employing DC appliances.

Solar Energy Panel Price

The cost of solar energy panels decreases with increase in quantity. For example, an order 10 kW solar energy panel will cost you less per kW as compared to 5 kW order. The difference becomes more pronounced for even larger quantities.

Monocrystalline solar energy panels are slightly expensive as compared to polycrystalline solar panels.

Below are some of the approximate Solar Energy Panel price in India.

Solar Energy Panel Size

Price (₹/Wp)

Total Price

335 Wp

25 ₹ 8,375

325 Wp

25

₹ 8,125

320 Wp

25 ₹ 8,000

315 Wp

25

₹ 7,875

310 Wp

25 ₹ 7,750

305 Wp

25 ₹ 7,625

300 Wp

25

₹ 7,500

280 Wp

25

₹ 7,000

250 Wp 25

₹ 6,250

Kindly note that,

  • These are approximate prices for your reference.
  • The prices vary depending on the quantity of order.
  • GST will be extra as per Government norms from time to time.
  • Transportation charges will be extra (as per actual).
  • Panels of sizes, other than the ones mentioned above are also available.

For latest and exact prices, click here and fill the inquiry form. We’ll get back to you as soon as possible.

To know, best solar energy panel brands in India, click here.

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