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hollister Residential Solar Panels Multiple Facto
PostPosted: Tue 23:37, 16 Jul 2013
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People who glance at [link widoczny dla zalogowanych] a roof with solar panels in place don't realize the multiple factors behind their design and placement. Incorrectly calculating one element of a solar power system [link widoczny dla zalogowanych] can dramatically reduce the equipment's power-generating capacity.

One of the most important factors to consider before roof or pole-mounting photovoltaic cells is the degree of shading present. Individual cells are arranged in arrays or series on single photovoltaic or "PV" panels. Shade falling on just one cell can shut down the whole [link widoczny dla zalogowanych] series, including cells that are in full sun, and can create a current drain throughout the system.

The degree of light the panels will receive is also a major concern. Latitude and cloudiness are the greatest factors in determining luminosity. Two identical power arrays installed at the same latitude, for instance one in Seattle and another [link widoczny dla zalogowanych] in Spokane, WA, will [link widoczny dla zalogowanych] provide radically different amounts of electricity. The panel in Spokane, which receives semi-desert levels of sun will outperform the panel in perpetually cloudy Seattle.

The panels should be tilted [link widoczny dla zalogowanych] at approximately the same angle [link widoczny dla zalogowanych] as the site's latitude and, in the northern hemisphere, they cannot face more than 15 degrees off due south. Optimal tilt during [link widoczny dla zalogowanych] the summer months would be 15 degrees less than the area's latitude, and in winter 15 degrees more. Many residential roofs have neither the angle nor the correct orientation to capture the best sun in all seasons.

The systems that return the best performance are pole mounted and actively track the sun. Computer-controlled motors move the PV panels. The goal is to keep the surface precisely perpendicular to [link widoczny dla zalogowanych] the [link widoczny dla zalogowanych] sun, thus maximizing light capture and energy production. Tracking technology will increase energy production in a given system by 25% over stationary units.

Magnetic declination is also a factor, a detail of which most solar power neophytes are completely unaware. To achieve the proper angle for the panels, the [link widoczny dla zalogowanych] difference between the magnetic poles of south and truth south must be added or subtracted. Minneapolis, for instance, has an almost zero adjustment for declination, while Seattle's is approximately 19 degrees. Declination maps must be consulted for correct orientation of the array.

Finally, the relative performance of PV panels will vary by manufacturer and [link widoczny dla zalogowanych] model. It's best to read independent reviews in addition to consulting the product specification sheets to make a good evaluation. The highest performing residential solar power systems will likely be so expensive that full amortization in net electricity savings will be impossible. With good choices and a careful consideration of all relevant factors, however, substantial electrical savings are possible, which is why residential solar power generation continues to grow in popularity.
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