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<p><font size="4">What happens if the study shows yes, that their no
was wrong. Or does that never happen?😕</font></p>
<div class="moz-cite-prefix">On 12/26/2022 12:48 PM, Jay via
RE-wrenches wrote:<br>
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<div dir="ltr">If the utility is PG&E in my experience here is
what happens </div>
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</div>
<div dir="ltr">They say yes or no to the interconnection. </div>
<div dir="ltr">If no you have the option to request an engineering
study to determine how much solar. That study is at your
expense, paid in advance and the exact cost isn’t known until
the study is done. Could be $500 to $15,000 or more. </div>
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</div>
<div dir="ltr">I’ll be curious to know what happens </div>
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</div>
<div dir="ltr">Jay</div>
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<blockquote type="cite">On Dec 26, 2022, at 9:07 AM, Drake
Chamberlin via RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a> wrote:<br>
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<p><span style="font-size: 12pt;">William, </span></p>
<p><span style="font-size: 12pt;">I ran into this once on an
old transformer, which fortunately they changed at no
cost. It was a 10 kW transformer on a 200 A (48 kW)
service. They had some dimming of lights on heavy loads,
and the transformer was changed out on that basis, at no
charge. </span></p>
<p><span style="font-size: 12pt;">My questions for the utility
would be?</span><span style="font-size: 12pt;"></span></p>
<ul>
<li><span style="font-size: 12pt;">Are there any other PV
systems feeding the transformer?</span>
<ul>
<li><span style="font-size: 12pt;">If so, what is their
maximum production.</span></li>
</ul>
</li>
<li><span style="font-size: 12pt;">What size is the
transformer?</span></li>
<li><span style="font-size: 12pt;">What percentage of
transformer capacity is allowed to be back-fed.</span></li>
</ul>
<p><span style="font-size: 12pt;">If the math comes out in
your favor, you will have a good case to escalate to the
next level. </span></p>
<p><br>
</p>
<p><span style="font-size: 12pt;">Good Luck,</span></p>
<p><span style="font-size: 12pt;">Drake</span></p>
<p><br>
</p>
<p>Drake Chamberlin</p>
<p>Athens Electric LLC</p>
<p>Ohio Electrical Contractor’s License 44810</p>
<p>CO Master Electrician’s License 4526</p>
<p>NABCEP Certified PV Installation Professional</p>
<p>-------------------------------------------------------------------------------</p>
<p id="reply-intro">On 2022-12-25 13:58, William Miller via
RE-wrenches wrote:</p>
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">
<div id="replybody1">
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<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Wrenched:</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Merry
Christmas to those of you that observe such
traditions, or substitute the winter festivity of
your choice.</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">I helped a
previous employee install an Enphase IQ8 system on
his home. He applied for the utility approval
concurrently with his building permit The day he
got his final inspection the utility contacted him
and claimed "The aggregate generation exceeds the
identified transformer rating" and refused him a
Permission to Operate letter.</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Adding up
the service ratings of the homes on his secondary
we get about 336 kW of potential consumption.Â
Adding the grid-tied systems on his secondary we
get about 16.5 kW. How is it that the back-feed
exceeds the transformer rating?</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">I would
appreciate any insight on how to consider this
situation and how to fight it.</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Sincerely,</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">William
Miller</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Verdana','sans-serif';">Â </span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Arial','sans-serif';">Miller Solar</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Arial','sans-serif';">17395 Oak
Road, Atascadero, CA 93422</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Arial','sans-serif';">805-438-5600</span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Arial','sans-serif';"><a
href="http://www.millersolar.com/"
target="_blank" rel="noopener noreferrer"
moz-do-not-send="true">www.millersolar.com</a></span></p>
<p class="v1MsoNormal"><span style="font-size: 12.0pt;
font-family: 'Arial','sans-serif';">CA Lic. 773985</span></p>
<p class="v1MsoNormal">Â </p>
<p class="v1MsoNormal">Â </p>
</div>
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