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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I did some research on this a while back, and one thing I learned is that a switching regulator is more efficient than a linear regulator, which may be important to you in this case if battery or energy production capacity is a concern. You probably don’t have to worry about low voltage because you will have a low voltage disconnect method to protect the batteries that is well above the 20V mark. Since your bulk charging setpoint will likely be a bit higher than the maximum 28V specification, you will need to do some sort of regulation.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Here is a short tutorial on DC-DC converters that I found helpful:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.altera.com/support/devices/power/regulators/pow-regulators.html">http://www.altera.com/support/devices/power/regulators/pow-regulators.html</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Jason Szumlanski<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Fafco Solar<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>All Solar, Inc.<br><b>Sent:</b> Thursday, November 03, 2011 6:27 PM<br><b>To:</b> 'RE-wrenches'<br><b>Subject:</b> [RE-wrenches] Voltage Regulator<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hello,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I have a client running wireless comm. equipment that he would like to run from a 24vdc battery bank. Even though it will operate either 12vdc or 24vdc, he would like to maintain 24vdc +/- 4v. Any ideas out there would be helpfull.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Jeremy</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>All Solar Inc.<br>Jeremy and Amy Rodriguez<br>1463 M St<br>Penrose, CO 81240<br><a href="http://www.asolarelectric.com">www.asolarelectric.com</a><br>Phone 719-372-3808<br>Fax 719-372-3804<br>Email <a href="mailto:allsolar@scswifi.net">allsolar@scswifi.net</a><br>Email <a href="mailto:allsolar@live.com">allsolar@live.com</a></span><o:p></o:p></p></div></div></body></html>