<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>I have been assured by enphase that my 215 and 220 lose so little I do not have to worry, however I see them clip at 199 watts for more than 2 hours quite frequently (maybe 3 hrs) the curve is rising on a clear day and it flat tops at 199 W particularly with snow, cold, on my seasonal tracker <br><br>And yes other systems will exceed DC rating under same conditions<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Marco Mangelsdorf <marco@pvthawaii.com><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span
style="font-weight: bold;">Sent:</span></b> Sat, January 15, 2011 2:58:45 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Enphase and oversizing<br></font><br>
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<p class="MsoNormal">To those of you installing Enphases.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Other than their 210 only working with Sanyo and SunPower
modules, the vast majority of other mods only work with the Enphase 190.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Question: what’s the max size module that you’re
comfortable using with the Enphase 190?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">In there here parts I’m seeing competitors pairing the
Enphase 190 with modules in the 230+ watt range. Some are even pairing
the 190 with the SolarWorld 245. Talk about wasting the customer’s
money….</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">This strikes me as a bad design that essentially has the
homeowner throwing away some of his/her money on unused PV horsepower.
Here in the tropics, where the edge-of-cloud effect can be seen on a regular
basis, I see DC nameplate AND higher coming out on the AC side of my systems.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I’m wondering where others are on this question of
oversizing.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks,</p>
<p class="MsoNormal">marco</p>
<p class="MsoNormal"> </p>
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