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Date Posted: 13:03:23 05/03/12 Thu
Author: Popeye
Subject: Solar Information
In reply to: rabw 's message, "Re: Solar City opens in Mboro....how silly" on 11:56:39 05/03/12 Thu


At high noon on a cloudless day at the equator, the power of the sun is about 1 kW/m²,[11] on the Earth's surface, to a plane that is perpendicular to the sun's rays. As such, PV arrays can track the sun through each day to greatly enhance energy collection. However, tracking devices add cost, and require maintenance, so it is more common for PV arrays to have fixed mounts that tilt the array and face due South in the Northern Hemisphere (in the Southern Hemisphere, they should point due North). The tilt angle, from horizontal, can be varied for season, but if fixed, should be set to give optimal array output during the peak electrical demand portion of a typical year.

A 3 kilowatt-hour (kWh) household system running at a 15% capacity factor would produce 3kW*15%*24hr/day*365days/year = 3,942 kWh/year, or roughly one-third of the typical electricity consumption of a U.S. household. But this calculation may be misleading, because there is little reason to speak of "typical" results; in fact, solar may make sense for one household, but not for the house next door. This discrepancy can be attributed to the financial and practical considerations considered in determining viability.

GOOGLE invests in Solar
http://idealab.talkingpointsmemo.com/2011/06/google-invests-280-million-in-residential-solar-power-company.php

Concord Ma. offering
http://www.wickedlocal.com/concord/news/x1157750192/Solar-energy-opportunity-available-for-Concord-residents#axzz1tpEMuKU1

http://www.simpleenergyworks.com/blog.html/

Local MA install pics
http://www.newenglandbreeze.com/installations/residential/

Marlborough Install
http://www.newenglandbreeze.com/installations/load/136/

Nellis AFB Nevada
http://en.wikipedia.org/wiki/Nellis_Solar_Power_Plant

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