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My guess is that in your case the GTPV will just help alleviate the
volt drop situation. I wouldn't start adding transformers, etc
until you are having a problem. Put in the contract that this extra
cost may be necessary for proper function, but I would keep it as a
backup. Based on the numbers you just mentioned, you would only be
selling a surplus of 30 amps, and the existing wire should be
adequate for that.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 8/16/2016 1:16 PM, Howard Arey
wrote:<br>
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<p class="MsoNormal">Answers to all:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">No – I did not measure voltage at the
house. Right now, only an assumption of voltage drop based on
my perception of what “typical” loads might be on this 150-amp
service. I wasn’t expecting to see such small wires for such a
long run from transformer to house when I showed up there
without a voltmeter. He is a heavy user, using 6,000 kwh in
some months<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We’re looking at a 20KW system (he has some
other expansion requirements, he has the roof space, and the
need.) I roughly estimate that he’ll use onsite 40-50 amps of
the 82 amps at peak inverter power output.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Interesting to hear of one transformer
response and hope to learn more on that, too.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Howard “Scot” Arey<o:p></o:p></b></p>
<p class="MsoNormal">Owner, Solar CenTex<o:p></o:p></p>
<p class="MsoNormal">254-300-1228<o:p></o:p></p>
<p class="MsoNormal"><a class="moz-txt-link-abbreviated" href="mailto:scot.arey@solarcentex.com">scot.arey@solarcentex.com</a><o:p></o:p></p>
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