Solar Installation Training

Solar panels

June 6, 2012 by admin in Solar with 0 Comments

Solar Panels – An introduction

Solar Panels (also known as PV Cells) are the major source of electricity generation applications in commercial and residential deployments around the world.  These small sized PV (Photovolatic) Cells are deployed in a collection or an array format to generate large amount of electricity.

Here we look at what they are made of and how they function.


solar energy

Basic Principle:

The basic principle of Solar panels is to use the sunlight to generate electricity using the photovoltaic effect.  It generates electricity when light (photons) hit the silicon wafers.  These photons contain different amounts of energy and when they hit the PV cells, they are either reflected or absorbed.  The photons that get absorbed will transfer its energy to electrons thus generating electricity.

Types of Solar Panels:

     Monocrystalline panels are the considered most efficient ones.  That’s why they are most commonly deployed too.  You need only few of them to generate high electricity rates which is ideal for short space deployments such as roofs.  However, they are also very expensive.

     Polycrystalline panels, also known as multicrystalline panels, are less efficient, but less expensive to produce.  They take up less amount of silicon and look a little different than Monocrystalline panels.

     Thin Film Panels, also known as Amorphous Panels, are very thin and extremely inefficient in generating electricity.  They are very cheap to make and usually are deployed in large fields rather than roofs where space is an issue.

Solar Panel Mounting:

There are three major ways a panel can be mounted – Fixed, Adjustable or Tracking.  Fixed panels are the least costly and are most commonly found on roofs.  Once you install them on your roof, you forget about making any changes to its angle etc.  The Adjustable ones are most commonly found in fields where you adjust for Sun’s angle in winter and summer.  The Tracking panels will follow the path of Sun as the day progresses and are the most expensive ones.   Overall the Tracking panels will generate 20% to 40% more output than the fixed panels.


Due to very low voltage of individual cell, they are deployed either in serial format to generate high voltage output or in wired in parallel to generate high currents.  Panels are manufactured in a weather proof casing making them solid and ready for use in rigid environments.  A PV array is a collection of Solar Panels typically deployed in residential and commercial applications.  These arrays generate direct current (DC) which is then transferred into AC power using inverters. These panels have no moving parts and are very earth friendly with very minimum waste.

Tagged , , , ,

Related Posts

Leave a reply

Your email address will not be published. Required fields are marked *


Recent Posts
RSS Solar Energy News
  • Women leaders in the energy sector increased in 2019 but more work must be done June 3, 2020
    Advocacy group POWERful Women, in partnership with PwC, this week published the latest ‘state of the nation’ report on gender balance in the UK energy industry. The 2020 annual board statistics show progress in the number of women occupying board and executive board seats – now 21% and 13% – representing a noticeable shift from... The post Women leaders in t […]
  • Siemens wins first offshore wind turbine order in France June 3, 2020
    Offshore wind energy company Ailes Marine has selected Siemens Gamesa Renewable Energy for the provision of 62 offshore wind turbines. The wind turbines will be installed at the 496-MW Bay of Saint Brieuc offshore power plant in France. The two companies have also signed a 10-year wind turbine maintenance service deal. The Nacelles and blades... The post Sie […]
  • Excelsior and Unico Solar for long-term partnership to build 250-MW of C&I solar projects June 3, 2020
    This week, renewable energy investor, Excelsior Energy Capital, and solar energy systems developer and investor, Unico Solar Investors, announced the closing of a joint-venture partnership to build, own and operate a 250-MW pipeline of C&I solar projects in North America. Unico Solar will use its real estate network to develop and manage the portfolio as […]
  • Big Rivers Electric Coop signs PPA for 100 MWs of solar capacity in Kentucky June 3, 2020
    This week, Community Energy announced a deal with Big Rivers Electric Corporation creating 100 MW of new solar power in western Kentucky. Under two 20-year Power Purchase Agreements (PPAs), Big Rivers will buy 100% of the output of new two solar farms developed by Community Energy. According to the companies, these facilities are expected to... The post Big […]
  • Coming out of the crisis: A safer, healthier, stronger New York June 2, 2020
    COVID-19 has hit New York hard, and New York has responded with its trademark toughness and attitude. I couldn’t be more in awe of the bravery of the medical professionals and essential workers who are putting everything on the line for all of us.  It is because of those brave New Yorkers working in hospitals,... The post Coming out of the crisis: A safer, h […]
  • Scout Clean Energy completes construction of 180-MW Heart of Texas Wind Farm June 2, 2020
    Colorado-based renewable energy developer, owner and operator, Scout Clean Energy, completed construction and successfully closed tax equity funding for the utility-scale 180-MW Heart of Texas Wind Farm (HTX) in McCulloch County, Texas. Scout is a portfolio company of Quinbrook Infrastructure Partners. HTX utilizes 64 of the latest generation GE 2-MW platfor […]