
The two most common types of solar energy systems are solar thermal and photovoltaic systems. Solar thermal systems heat water for residential and commercial use or are used for swimming pool heating. Both are extremely efficient and have a quick return on investment. Anyone who has picked up a garden hose on a hot summer day can relate to how effectively the sun can heat water.
Photovoltaic systems convert light energy from the sun into usable electrical power that can be distributed into your home or business and even fed back into the utility grid. PV systems allow us to capture as much light as we want to power as much electrical load as we want, all without burning an ounce of fossil fuels. The three most common types of solar-electric systems are grid-intertied, grid-intertied with battery backup, and off-grid (stand-alone). Each has distinct applications and component needs.
Photovoltaic (PV) cells are made of special semi conducting materials. Hi purity monocrystalline or polycrystalline silicones are the most prevalent materials used today. A collection of cells comprise a module (solar panel) and a collection of modules comprise an array. Ba sically, when light energy (photons) strike the cell, a certain portion of it is absorbed within the semiconductor material.
This means that the energy of the absorbed light is transferred to the cell. The light energy knocks electrons loose, allowing them to flow freely within the cell. PV cells have electrical fields that act to force electrons freed by light absorption to flow in a certain direction. This flow of electrons i s a DC electrical current.
By placing metal contacts on the top and bottom of the PV cells, we can draw that current off to be converted and put to use. This current, together with the cell’s voltage (which is also a result of its built-in electrical field or fields), defines the power output (or wattage) that the solar cell can produce. Having enough of this pv hardware working together converting enough light energy into the desired amount of usable electrical wattage creates the end result… free electricity.
Independent Green Technologies is a one stop shop for solar energy production and energy conservation assistance. We can design, permit, install, commission and performance monitor solar electric (photovoltaic) systems as well as solar water heating and solar swimming pool heating systems of any size. We can do turn key systems as large or small as desired. And we can certify and sign off on all the necessary rebate and incentives paperwork. And with our relationships to other local green energy experts, we can help you explore the benefits of geothermal systems as well, which is another of our areas underutilized renewable energy options.
In an effort to help grow the use of solar and make it more affordable to more people we have become perhaps the only area solar contractors willing to help those that may want to do it themselves. We can help you design the right system and acquire the ideal equipment for your needs at greatly reduced costs. We offer unlimited sharing of knowledge and advice. We can help you as little or as much as you may need along the way.
Solar energy is a resource we should all be able to benefit from and we are willing to do all that we can to help as many people as possible take advantage of it. We can acquire custom designed or pre-engineered energy solutions equipment to fit any requirement. So if you are a die hard solar fan and a capable “do it yourselfer”, you are in the right place.
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