How Solar Panels Produce Electricity

Solar energy is one of the most promising sources of electricity owing to a number of inherent factors. Unlike conventional sources of energy like fossil fuels, solar radiation is abundantly received in most regions of the world. Electricity generation by solar requires little to no inputs of raw material and perfectly fits the bill for clean energy. But what is the science behind tapping solar energy? How exactly do solar panels produce electricity and how efficient is solar energy really? In this blog, we simplify the working principles behind solar electricity and elucidate your understanding of this magnificent fuel for the future.

Solar panels are made up of a number of Photovoltaic (PV) cells (named so because they convert solar energy into electric energy). The PV cells are made up of semiconductor materials such as silicon that absorb solar radiation and release a number of electrons, which then travel freely in the cell. To create an electric field when sunlight hits the panel, a positively and a negatively charged semiconductor is sandwiched together. The electric field directs the flow of the loose electrons towards the conductors lining the cell, which then flow through the wires as Direct Current (DC). 

The DC then reaches the inverter that converts it into the most commonly used Alternating Current (AC). Finally, a wire carries the AC from the inverter to an electric panel which acts as a junction for distributing the current throughout the building.

One PV cell typically generates two watts of electricity. However, when a large number of PV cells are connected together on a solar array (PV panel), hundreds or even thousands of kilowatts of electricity can be generated. A PV panel is made up of solar cells arranged in the configuration of 32, 36, 48, 60, 72, or 96 cells. The larger the assembly, the greater will the electricity produced be! The standard panel size for commercial use is 77 x 39 inches, while that for residential purposes is 65 x 39 inches. 

The energy efficiency of most PV panels ranges from 15% to 20% at present. This is affected by varying solar radiation received at different geographical locations. Sunlight also varies according to the time of the day and seasons of the year. Besides, obstruction, shade and unclean panels can also reduce production significantly.

The principle behind solar energy is quite simple. However, there’s still ample scope for advancements in order to boost production capacity and enhance efficiency. This demands generous funding in the field to promote research and innovation. For more information on various types of solar services, feel free to contact us on +91 98199 07445. We would be happy to assist you in finding the best match, based on your requirements. As one of India’s best solar companies having 73 years of market experience, VEMC provides end-to-end Solar EPC services to its clients. VEMC is ISO 9001:2015 certified and a pioneer in the field of electromechanical engineering products, allied equipment, and services. Our sub-brand VEMCO Solar is one of the leading solar EPC companies — be it solar plant erection, procurement, commissioning, net metering, or electrical connections.

4 Tips on Increasing Solar Panel Efficiency

As the demand for sustainable energy grows, solar power stands out as the most favoured choice for the future. However, as solar systems require significant investment due to the high cost of semiconductors and allied components, it is important that maximum possible energy is generated from each square foot of a photovoltaic panel. Solar Operations and Maintenance (O&M) companies play a huge role in ensuring the highest efficiency of the solar power systems but some simple tips based on a common understanding of solar energy can go a long way in enhancing your output.

Well, the science behind solar energy is very simple — the higher the exposure of solar cells to sunlight, the greater will the output be. It is around this fundamental principle that most of these efficiency-enhancing tips revolve:

  1. Avoid shade: Due to the installation of intricate groupings of solar cells in a panel, even if a small part of the panel is covered by shade, the whole module will have less energy conversion. Shade is therefore a major inhibitor of solar energy and must be minimised as much as possible. This requires careful placement of the solar panels, away from a permanent high-rising object like a chimney or a vent. Tall trees around the facility must be well-trimmed to ensure their shadow doesn’t fall on the panels at any time of the day.
  2. Careful orientation: Solar panels must be oriented in the direction where they receive maximum sunlight throughout the day. This completely depends on the geographical location of the installation. India being a country in the northern hemisphere, the solar panels are always made to face the south to receive maximum sunlight. In the US, both south and west are the favoured directions and have been known to produce the maximum output.
  3. Proper upkeep: Solar panels can get covered in dust, dirt and bird droppings in a very short span of time. As they are mostly installed on rooftops, it might get a little difficult to clean the panels regularly. This could reduce the efficiency of the panels as some or whole of their surface area is screened from the sunlight. Providing convenient access to the panels and cleaning them regularly is therefore important.
  4. Weather: Hotter days ironically generate lesser energy due to increase in current and drop in voltage. While controlling the weather is beyond our ability, we can surely be mindful about buying panels with the lowest temperature coefficient, which refers to the amount by which the output of a panel reduces after temperature rises beyond 25⁰C.

For assistance to decide on the solar panel that suits your needs the best, feel free to contact us on +91 9819907445. We would be happy to assist you in finding the best match based on your requirements. As one of India’s best solar companies, with 73 years of market experience, VEMC provides end-to-end solar services to its clients. VEMC is ISO 9001:2015 certified and is one of the leading solar EPC companies in India.

6 Things to Ask Solar Consultant

It is really important to let your guards down and learn everything about solar panels before you plan to get one for your residential or commercial space. Well, having a direct chat with solar consultants might be your guide over here. As they are associated with this field for a pretty long time, you can expect to get quality responses to all your queries. So, let’s learn about the 6 things that you should primarily ask your consultant, especially from Vijay Engineering and Machinery Company (VEMC).

1.Don’t forget to ask about the Financial Options:

Can you benefit from that tax credit? Does the solar energy consultant have any lease option or competitive loan by his side for the clients? Most companies will push for the Power Purchase Agreement. It will make your solar contractor the electric company. It means you are not going to own the system and just need to pay for the power it produces for your place. But, the solar contractor has every right to raise the rates. That’s why another loan or leasing program with a 0 down and 0 increase guarantee is always important for most customers.

2. Ask to check their design centre:

If you want, the consultant can sees the company’s design centre or operation office. Avoid letting them meet you at your place. You need to know more about the company and its precise workflow because you proceed further and get panels from their sides. When you have experienced groups like Vijay Engineering and Machinery Company (VEMC), you don’t have to worry much. With 72 years of experience, you can expect only the best from this source!

3. Ask for expansion of solar energy system in future:

This is another interesting point for you to jot down whenever you are dealing with the solar panel consultant for your queries. Ask them if they can expand the current solar system later if the need arises. With some countries becoming less dependent on fossil fuel, the consumers need to know if they can create a larger system in the near future for accommodating the power needed for their devices.

4. Ask more about the panels:

You should ask the consultant about the solar panels they are planning to install at your place. Always remember that not all panels are the same. Some are more durable and efficient than others. Experienced companies like Vijay Engineering and Machinery Company (VEMC) are able to produce around 75% more energy over the course of their working period. So, always research the panels through one third-party source to ensure that the products will last long.

5. Ask about the benefits of working with them:

There must be some benefits involved while working with a local solar contractor over a national brand. So, do ask about those benefits before you get yourself involved with their solar panels. Vijay Engineering and Machinery Company (VEMC) is one ISO 9001:2015 certified firm and a pioneer in the field of electromechanical engineering items, allied equipment, and all the necessary services. This company is CRISIL MSE-1 rated. They are known to present strategic expansion and consistency throughout for providing excellence in service, quality of product, and leadership. So, working with this team will save you a lot of money and time!

6. Ask if moving towards solar panel is a good call for you:

Well, the answer to such a question can be a complex one. It depends on multiple physical factors. How much are you currently paying on your electric bill? How much shade does your roof actually get? Why are you looking for solar panels? Is it because of the financial benefits or anything else? Make sure to get these questions answered first before you can opt for the solar panels.

Get help from Vijay Engineering and Machinery Company (VEMC):

If you are currently eyeing the most affordable solar panel system cost and panels that are designed to last long, then Vijay Engineering and Machinery Company (VEMC) is your name. VEMC Solar presents end-to-end solutions, starting from selecting the right set-up kin to the final selection of best Opex or Capex models. So, you can trust this team for getting all your solar panel queries answered.