solar panels

Solar Panels = free energy


Solar panels convert the sun's light energy into electricity.  Solar cells, or photovoltaic cells, are grouped together and packaged into a panel to produce a specific wattage of electricity.  Multiple solar panels are arranged in an array and installed on a roof or in a field that can power a home or business.  New Federal tax credits of 30% for solar panel installation have combined with state and local incentives to drastically lower the payback period for a solar power system.  With prices of alternative sources of energy rivaling those of fossil fuels, the future of energy is bright.

solar panels convert the suns energy into clean free electricity

Solar panel technology is developing rapidly

Solar panels come in two main forms.  The form most people think of is the photovoltaic solar panel which converts the light energy of the sun directly into electricity.  The second type is the thermal solar panel.  This panel collects the sun's heat energy and stores it for use in heating or power generation.  Good news - new federal tax incentives for both photovoltaic and thermal solar panel purchases allow a full 30% rebate from the federal government.

Photovoltaic solar panels

Solar panels used for photovoltaics have been around for more than 50 years.  They were initially developed for space applications as a source of electricity for satellites.  Solar panels were ideal for this application because they could operate in harsh conditions of extreme heat and cold and had no moving parts.  The best solar panel efficiency of the early models was about 8-9%.  Today photovoltaic solar panels have three main types:

Mono crystalline solar panels

Mono crystalline solar panels are created from solar cells that are cut from a single crystal ingot of silicon. These solar panels are more expensive because of the cost of the special silicon, but are very durable and yield the highest efficiency available (almost 20%).  Silicon prices have fluctuated wildly in the past few years, dropping by more than 75% in the last 6 months.  As a result solar panels have dropped in price making home solar panel installation even more attractive.

Poly crystalline solar panels

Solar panels made from poly crystalline cells have improved efficiency over the last few years.  They now are competitive with mono crystalline in efficiency and at generally lower cost. As a result, most solar panels made today are poly crystalline.  Efficiency of these solar panels is typically only 10% less than mono crystalline panels.

Thin film solar panels

Thin film solar panels are the newest innovation in solar panel technology.  Thin film gets its name because the solar panels are created by spraying a photovoltaic mixture onto a thin metallic substrate.  One benefit is that this material can be made quickly and in great volume, similar to the way newspaper presses operate.  Because thin film solar panel material is flexible, it can also be shaped and applied to a wide variety of applications.  New innovations such as photovoltaic clothing are being developed.  The downside of thin film is that the solar panel efficiency is about half that of the mono and poly crystalline types.  This negative is counterbalanced by the much lower cost of these types of panels.  Competition from thin film solar panels may indeed be the catalyst for an industry wide drop in solar panel pricing in the years to come.

Thermal solar panels

Solar panels used for thermal applications are completely different than their photovoltaic cousins.  Thermal solar panels use the very basic concepts of heat absorption and conduction of liquid to transfer the suns heat energy where it is needed.  The most common use of thermal solar panels is for solar water heating.  Simple solar panel collectors are placed on the roof of the home.  Water heated by the sun is moved to storage tanks ready for use in showering or dish washing or in the hot tub or pool.  Because most household energy is used to heat hot water, deploying thermal solar panels is usually the most efficient initial use of solar energy. 

Solar panel Kits

Solar panel kits are a great way to get started with solar power.  Solar panel prices have come down and efficiency has risen in the last few years.  New modular solar panel design makes it much easier to assemble the pannels along with the other kit components into a working system.  DIY solar has grown exponentially because of these technical advances.

Solar panel installers

Solar panel installers are available to consult with you about solar panel installation on your home or business.  They specialize in solar panel system sizing and location.  Installers will study your site by looking at aerial photographs (some use Google Earth very effectively).  Because shading is a big problem for solar panels, they will ensure the system is not blocked by trees or chimneys throughout the day.

Net Metering - connecting your solar panels

If you live in a populated area with access to the local power grid, you will most likely have your soler panels connected to the grid through a special power meter.  The concept of "net metering" allows you to sell your excess power back to the local power company, receiving a credit toward your power bill.  In some instances your bill can be totally eliminated or you will receive a check from the power company.  Imagine that.  Most solar panel owners also practice efficient energy use and employ energy efficient appliances and conservation in order to maximize their payback.

Solar panels off the grid

While net metering is great for those with access to the grid, a lot of solar panel owners have their systems in order to get OFF the grid.  We share this goal and purpose.  The main difference in going off the grid is in the requirement for a battery backup system and a stricter adherence to efficiency.

DIY solar panels

A fairly large cottage industry in DIY solar panel creation has grown in the past few years.  Many DIY'ers are recycling old and broken solar pannels into interesting new devices.  Check out the DIY solar page for videos.

Solar pannels - anyway you want to spell it

There are a number of common misspellings for the term "solar panels".  It is occasionally spelled solar pannels, sometimes soler panels.  You could even spell it soler pannels, or solar panals, but that would be pretty far off...  Anyway you spell it, it still means clean, free energy from the sun.


Tags: solar panels, how do solar panels work, free solar panels, home solar panels, how to make solar panels, soler panels, solar pannels, solar panals, solar panal,

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