0.9 x latitude seems to be a good rule of thumb for direct grid-tie systems.
-------- Original Message -------- Subject: Re: Malabar Cove Solar Array From: ScottT <schroeders_homes_sup...@dschroeders.com> To: Dave Click <davecl...@fsec.ucf.edu> Date: 2010/1/2 12:39
Hello Wrenches, My Solar Pathfinder Assistant (SPA) claims that the optimum tilt angle for the solar modules is latitude. I'm skeptical. The system being designed is a direct grid tie, ground mount. It seems to me that an angle of latitude will give a balanced angle for both summer and winter charging. Since there is far less energy available in the winter, is this balance really the best. Also, a flatter angle in the summer should gain more hours of sun, since the sun goes N of the E-W axis. With ballasted systems, the 15 degree angle is supposed to work just fine, due to better summer charging. Does anyone have an answer to what really is the optimum tilt angle for a direct grid tie system? Is the SPA geared toward off grid systems, or is latitude really the best? Thank you and best wishes for the New Year, Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options& settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules& etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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