<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div><span>David, et al</span></div><div><span><br></span></div><div><span>Yes, their literature states max output power of 215. Not sure how that is controlled, except for electronically. </span></div><div><span><br></span></div><div><span>So this could be the shunt, so to speak and must take into consideration voltage to follow some algorithm to keep things humming along at that threshold.</span></div><div><span><br></span></div><div><span>Having said this- are we "throwing away" power then?</span></div><div><br></div><div>Keith<br><div style="font-size: 10pt; font-family: arial, helvetica, sans-serif; "><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "><font size="2" face="Arial"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Dave Click
<daveclick@fsec.ucf.edu><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> Wednesday, August 24, 2011 7:29 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] Enphase 215<br></font><br>The inverter should be current-limited on its output. The other Enphases <br>have a higher output power than rated (199 @ 190, 219 @ 210, if memory <br>serves from earlier list posts), so this may have a similar window.<br><br>215Wac max inverter output / 240V = 0.896<br>0.896 x 17 = 15.23A<br>15.23A x 1.25 < 20A so it's OK.<br>As long as the inverter output is actually 225W or less, you can fit 17 <br>on a 20A circuit.<br><br>As before, you'd have the inverter limiting output when the high-power <br>modules are actually performing near or above STC. There will certainly <br>be times during the year where the inverters are
maxed out but those <br>times will be a small portion. Enphase had some documentation on their <br>site about this where they claimed it wasn't worth worrying about, but <br>it's a site-specific question that the installer should answer.<br><br>On 2011/8/24 0:20, Keith Cronin wrote:<br>> Hey gang<br>><br>> With the 215's on the scene and the tech literature on their website,<br>> they state you can put up to 17 modules on a string.<br>><br>> Locally, I see folks throwing on 17-235 watt modules. Back of the<br>> napkin- 235 watts/240 volts = .97 amps.<br>><br>> 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the<br>> circuit, per NEC and in situations of lower voltage, could tip the<br>> current higher, per module it seems or is the unit current limiting?<br>><br>> Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to<br>> 20 amp circuit also is a change for the industry at
large, as well as a<br>> few other changes.<br>><br>> As Solarworld is rolling out their 250 watt and others in the same zone,<br>> it seems there should/could be some caveats on the enphase literature to<br>> reflect this.<br>> Thoughts, comments?<br>><br>> Keith<br>><br>><br>> _______________________________________________<br>> List sponsored by Home Power magazine<br>><br>> List Address: <a ymailto="mailto:RE-wrenches@lists.re-wrenches.org" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>><br>> Options& settings:<br>> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>><br>> List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org"
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