<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Folks,<div>In several months we will be installing a 100kW ground mounted PV system for one of our commercial customers. I'm in the planning stage and am looking at the wire runs. The site requires a 700' underground wire run between the 480V service and the single central inverter located at the array (a PVP100kW unit). I have two related questions: </div><div>1: Given the significant cost of the AC cabling for this situation, what is the most appropriate number to use for current in running voltage drop calcs? The wiring is going to be significantly oversized to achieve a ~1% VD at this length. I could use the max rated output current of the inverter (120A), but that seems like it might be overly conservative. Opinions?</div><div><br></div><div>2: It looks like the most cost effective and manageable solution for this run will involve several paralleled sets of cables. How important are the considerations of careful cable bundling? ie: putting several conductors per phase willy nilly in a trench vs having separate triplexed bundles.</div><div><br></div><div>Thanks in advance for your thoughts.<br><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; 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-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; 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text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="font-size: medium; "><span class="Apple-style-span" style="font-size: 12px; "><br></span></div></div></span></div></span></div></span></div></span></div></span><span class="Apple-style-span" style="font-size: 12px; "> </span></div></div><br><div> <span class="Apple-style-span" style="border-collapse: separate; 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: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; 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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-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; font-size: 12px; ">Luke Christy </blockquote><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; font-size: 12px; "><br>NABCEP Certified PV Installer™: Certification #031409-25 (Luke Christy)</blockquote><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; font-size: 12px; ">NABCEP Certified Solar Thermal Installer™: Certification #ST032611-03 <br> CoSEIA Certified PV Installer (Luke Christy)<br><br>Solar Gain Services, LLC<br>Monte Vista, CO.<br><a href="mailto:SGSRenewables@Gmail.com">SGSRenewables@Gmail.com</a></blockquote><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; font-size: 12px; "><br></blockquote></div><div><br></div></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"> </div><br></body></html>