<div dir="auto">Around here a 385W module on an IQ7+ rarely flatlines, even at optimal orientation. I was concerned that a 420W module at 208V/290W max on an IQ7A would start to be problematic, but PVWATTS disagrees. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 3, 2021, 6:14 PM Chris Worcester <<a href="mailto:chris@solarwindworks.com">chris@solarwindworks.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word"><div class="m_-5091871486901046976WordSection1"><p class="MsoNormal">There\u2019s the inverter max output amps, that\u2019s it. 290 watts for either the 7 a or 7+ on the 208 VAC, they\u2019re equal for sure. So put on a 420 watt panel but don\u2019t expect to make a bit more production midday, all you get is a bit quicker ramp up in the AM and a bit longer 290w output in the evening. I\u2019d put something in the 320 to 350 w range on these micros, max. We are in a cooler climate too maybe than most, around the Reno Tahoe area. I have LG 310\u2019s on S280\u2019s that are seeing flattening on the Enlighten output graphs midday now in the spring. <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Chris Worcester<u></u><u></u></p><p class="MsoNormal">Solar Wind Works<u></u><u></u></p><p class="MsoNormal">NABCEP PV Installation Professional<u></u><u></u></p><p class="MsoNormal">Cell 530-448-9692<u></u><u></u></p><p class="MsoNormal"><a href="http://www.solarwindworks.com" target="_blank" rel="noreferrer">www.solarwindworks.com</a><u></u><u></u></p><p class="MsoNormal"><a href="mailto:chris@solarwindworks.com" target="_blank" rel="noreferrer">chris@solarwindworks.com</a><u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches-bounces@lists.re-wrenches.org</a>> <b>On Behalf Of </b>Jay<br><b>Sent:</b> Wednesday, March 03, 2021 12:46 PM<br><b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>><br><b>Subject:</b> Re: [RE-wrenches] Enphase IQ7A 3 phase limitations<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Emphase has a white paper showing production vs module size and locations around the country.<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I don\u2019t know if it\u2019s more accurate than pv watts but you might check it out. <u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Jay<u></u><u></u></p></div><div><p class="MsoNormal">Peltz power. <u></u><u></u></p></div><div><p class="MsoNormal"><br><br><u></u><u></u></p><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p class="MsoNormal" style="margin-bottom:12.0pt">On Mar 3, 2021, at 12:13 PM, Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer">jason@floridasolardesigngroup.com</a>> wrote:<u></u><u></u></p></blockquote></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal">\ufeff<u></u><u></u></p><div><div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif">I'm wondering how accurate the DC to AC ratio is when using PVWATTS. I did a quick PVWATTS analysis at my local area using a typical commercial roof tilt and found that using a 420W module on an IQ7A versus a 385W module on an IQ7+ yields almost identical results. The 420W module has 1% less annual production at to the 145% ratio compared to the 132% ratio with the 385W module.<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Given that, I can't imagine why anyone would use the IQ7A versus the IQ7+ on a 208V system. Why incur the additional cost if the AC output current is identical for both inverters? <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif">If PVWATTS is right, I guess it's a non-issue in my local area, but it may vary in other locations where clipping is more common. The heat here results in little clipping at a 132% ratio here, and I guess at 145% the morning and afternoon advantages largely outweigh the mid-day clipping increase.<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Jason Szumlanski<u></u><u></u></span></p></div><div><div><div><div><div><div><div><div><div><p class="MsoNormal" align="center" style="text-align:center"><b><u></u> <u></u></b></p></div></div></div></div></div></div></div></div></div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal"><br><img border="0" width="1" height="1" style="width:.0104in;height:.0104in" id="m_-5091871486901046976_x0000_i1025" src="https://mailtrack.io/trace/mail/5eb252f6e6d870638e7a0fd58093488ac94a581b.png?u=1613865"><u></u><u></u></p><div><div><p class="MsoNormal">On Tue, Mar 2, 2021 at 10:00 AM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer">jason@floridasolardesigngroup.com</a>> wrote:<u></u><u></u></p></div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal">I was surprised to learn that the IQ7A is limited to 290 W continuous at 208 volts. That pretty much puts Enphase out of the running for light commercial jobs with new high-powered 72 cell panels. Any thoughts on this?<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Jason<u></u><u></u></p></div></div></blockquote></div></div><p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank" rel="noreferrer">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>There are two list archives for searching. 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