<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">William,<div class=""><br class=""></div><div class="">Over the years I have discovered that many published voltage specifications for equipment, like SCADA radios for example, are nominal voltages but actually can be powered from a broad range of voltages The internal PS circuit handles delivering the correct voltage. 30 volts is an odd spec so if you can get your hands on the unit, apply a variable DC supply to discover the true operating range. You may be surprised that it functions just fine with your existing power system. Save cost and KISS. <div apple-content-edited="true" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class="">Larry Crutcher<br class="">Starlight Solar Power Systems<br class=""><br class=""></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><br class=""></div></div></div></div></div></div>
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<br class=""><div><div class="">On Mar 28, 2016, at 12:44 PM, William Miller <<a href="mailto:william@millersolar.com" class="">william@millersolar.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><meta name="Generator" content="Microsoft Word 14 (filtered medium)" class=""><style class=""><!--
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--></style><div lang="EN-US" link="blue" vlink="purple" class=""><div class="WordSection1"><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">Friends:</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">I am designing a satellite data interface for a large off-grid system for a state highway department facility. We will be using the Outback Optics data capabilities along with equipment manufactured by Control by Web.</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">I’d like to run the satellite system on a battery power source so I can hope to use it when we need it most, when the power is down. We have a separate 24 volt battery bank remaining from a previous generator control system. The satellite system operates on 30 VDC at 2 amps.</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">My first choice is to find a DC to DC converter from nominal 24 volts. Do any of you know of one that you could recommend?</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">My second choice is to use a small inverter. Can anyone suggest one at this small wattage? I don’t know how good the power supply is at rejecting waveform distortion so I presume an inverter needs to be somewhat close to a sine wave.<br class=""><br class=""></span></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">Thanks in advance.</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class="">William Miller</span></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class=""><span style="font-size:12.0pt;font-family:"Arial","sans-serif"" class=""> </span><br class="webkit-block-placeholder"></div><div class="MsoNormal"><span style="font-size: 10pt; font-family: Arial, sans-serif;" class=""><span id="cid:image003.jpg@01D188EF.808B9E50"><image003.jpg></span><br class="">Lic 773985<br class=""><a href="http://www.millersolar.com/" class="">millersolar.com</a><br class="">805-438-5600</span></div><div class=""><br class=""></div></div></div><br class=""></div></div><br class=""></div></body></html>