<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" id="yui_3_16_0_1_1443721524175_70702" class=""> >why not just use one on the sink end.</span><span></span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class=""><br></span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class="" id="yui_3_16_0_1_1443721524175_70851">I see now that my wrinting did not make this clear, but absolutely my intention was 44vdc as the max voltage with a DC-DC converter at the Pi. My point was that in this case of dropping from 44v to 6v, your DC-DC converter may only provide 60% power efficiency, or worse. You would have to find the best DC-DC conv. for this situation. So 7-8W from 13W is still quite a lot of power for a Pi. It does mean an extra DC-DC component. So it seems this is quite achievable even within the standards. I also saw that there is a PoE+ from 2009, which is 25W. On top of that I seem to remember that before their was a common specification that there were some custom specifications applicable to specific product manufacturers, which lead to a common specification. In any case please disregard any talk about the custom specification. Certianly possible if you use good Engineering principles, but not recommended or needed in this case. </span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class=""><br></span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class="" id="yui_3_16_0_1_1443721524175_71331">Despite all this possibility, it would be my last choice to power a Pi. Used only if I needed runs far away from a power source. Unless you are already invested in PoE devices, it will add components and/or extra engineering, when I would rather just plug the device in if I can.</span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class=""><br></span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class="" id="yui_3_16_0_1_1443721524175_71332">Certianly Lightning is a concern and NC is one of the top lightning states (2nd or 3rd perhaps?) if you did not know that. I only found out in the past 5 yrs or so, because unitl then, I always thought it was a short on lightning, having grown up in Florida. In power substations, we have all but eliminated copper runs for fiber for this very reason. So this is a valid concern for any long copper run.</span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class=""><br></span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><span style="font-size: 16px;" class="" id="yui_3_16_0_1_1443721524175_71619">John Vaughters</span></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><br></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><br></div><div id="yui_3_16_0_1_1443721524175_70553" dir="ltr"><br></div> <br><div class="qtdSeparateBR" id="yui_3_16_0_1_1443721524175_70714"><br></div></div></body></html>