<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I think the answers you want might be in this document. See Page 5.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><a href="https://knowledge-center.solaredge.com/sites/kc/files/se_3p_system_design_and_nec.pdf">https://knowledge-center.solaredge.com/sites/kc/files/se_3p_system_design_and_nec.pdf</a><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">(this document addresses 3-phase design, but it is still applicable)</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr">Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 13, 2024 at 3:18 PM Mick Abraham via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi, Wrench List colleagues~ I have a minor dispute with a technician at one of the solar superstores. He says the amp rating on SolarEdge optimizers needs a 25% "safety factor". <div><br></div><div>SolarEdge's spec sheet says "Maximum Output Current" for model S500 is 15 amps. I'm not sure if the technician would take 25% off the 15a or if he boosts the Isc amps (on the PV datasheet) by 25%. In one case, his allowable short circuit amps (from the datasheet) would be 11.25a and in the other case it's 12a.</div><div><br></div><div>If he's right, this "500 watt optimizer" could only process 500 watts in an unusual combination of Vmp and Imp. I know the PV's open circuit voltage should be calculated higher based on the lowest possible cell temperature, but I can't find any SolarEdge reference materials that address the amperage. I checked the SolarEdge videos, installation documents, and I even spent time in voicemail perdition. Their design tool at <a href="http://designer.solaredge.com" target="_blank">designer.solaredge.com</a> did suggest the S500 optimizer after I entered all the parameters for my preferred module. </div><div><br></div><div>Nothing else from SolarEdge so far...so it's Wrenchie time. It would be especially helpful if someone has a white paper or other document to clear this up. I'm pretty sure the technician wrong on this point, but I'd like to offer more than just my opinion. BTW, the PV's that I'd like to use are 450 watt monocrystalline, two strings of 54 cells and 14.55 amps short circuit current. The relatively low cell count does translate into higher amps per rated watt compared to a module with more cells in series.</div><div><br></div><div>Thanks as always; the Wrench List is the Bomb!<br><div><br clear="all"><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Mick Abraham, Proprietor<br><a href="http://www.abrahamsolar.com" target="_blank">www.abrahamsolar.com</a><br><br>Landline: 970-731-4675</div><div>Cell phone or for text messaging: 970-946-6584</div></div></div></div></div></div></div><div hspace="streak-pt-mark" style="max-height:1px"><img alt="" style="width: 0px; max-height: 0px; overflow: hidden;" src="https://mailfoogae.appspot.com/t?sender=abWlja0BhYnJhaGFtc29sYXIuY29t&type=zerocontent&guid=48636efc-e828-4d09-b281-f63501d9b32a"><font color="#ffffff" size="1">ᐧ</font></div>
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