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<p>The EG4 is not a bad split. Reason my client wanted it was a redundant cooling back-up if his battery/inverter/solar went down.</p>
<div id="signature">Definitely run AC to it from the main system. Getting close to the solstice and solar can power this well into the evening<span style="font-size: 18pt;">😎</span><br />
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<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noopener"> </a><a style="color: blue; font-size: 11px; font-family: 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-weight: 400; background-color: #ffffff;" href="https://offgridsolar1.com/" rel="noopener noreferrer"><span style="font-size: 12pt;">https://offgridsolar1.com/</span></a><a href="http://members.sti.net/offgridsolar/" rel="noopener"> </a>
e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p id="reply-intro">On 2025-06-19 10:53 am, William Miller via RE-wrenches wrote:</p>
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<p class="v1MsoNormal"><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;">There are two reasons I could see:</span></p>
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<p class="v1MsoListParagraph" style="text-indent: -.25in; mso-list: l0 level1 lfo1;"><span style="font-family: Symbol; color: #1f497d;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;">Your existing PV rating is too small.</span></p>
<p class="v1MsoListParagraph" style="text-indent: -.25in; mso-list: l0 level1 lfo1;"><span style="font-family: Symbol; color: #1f497d;"><span style="mso-list: Ignore;">·<span style="font: 7.0pt 'Times New Roman';"> </span></span></span><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;">You do not have any existing PV and you do not want to incur more utility expenses.</span></p>
<p class="v1MsoNormal"><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;"> </span></p>
<p class="v1MsoNormal"><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;">I do see a real limitation to direct-DC air conditioning (which I think is what we are discussing): No AC when the sun is not high in the sky. That alone makes this impractical</span></p>
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<p class="v1MsoNormal"><span style="font-family: 'Verdana','sans-serif'; color: #1f497d;">William</span></p>
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<p class="v1MsoNormal"><span style="font-family: 'Arial','sans-serif'; color: #1f497d;">Miller Solar</span></p>
<p class="v1MsoNormal"><span style="font-family: 'Arial','sans-serif'; color: #1f497d;">17395 Oak Road, Atascadero, CA 93422</span></p>
<p class="v1MsoNormal"><span style="font-family: 'Arial','sans-serif'; color: #1f497d;">805-438-5600</span></p>
<p class="v1MsoNormal"><span style="font-family: 'Arial','sans-serif'; color: #1f497d;"><a href="http://www.millersolar.com/" target="_blank" rel="noopener noreferrer"><span style="color: blue;">www.millersolar.com</span></a></span></p>
<p class="v1MsoNormal"><span style="font-family: 'Arial','sans-serif'; color: #1f497d;">CA Lic. 773985</span></p>
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<p class="v1MsoNormal"><strong><span style="font-size: 10.0pt; font-family: 'Tahoma','sans-serif';">From:</span></strong><span style="font-size: 10.0pt; font-family: 'Tahoma','sans-serif';"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" rel="noreferrer">re-wrenches-bounces@lists.re-wrenches.org</a>] <strong>On Behalf Of </strong>Jason Szumlanski via RE-wrenches<br /><strong>Sent:</strong> Thursday, June 19, 2025 10:25 AM<br /><strong>To:</strong> RE-wrenches<br /><strong>Cc:</strong> Jason Szumlanski<br /><strong>Subject:</strong> Re: [RE-wrenches] EG4 Mini Split</span></p>
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<p class="v1MsoNormal">I guess the secondary question is why would anyone use this system anyway in a grid interconnected environment. The only rationale I could see is to have some level of air conditioning when the sun is shining without having to go through the expense of adding a hybrid inverter and batteries. But by the time you install solar panels with a rapid shutdown system, the return on that investment seems terrible considering that much of the solar energy generated will be wasted unless you somehow need maximum cooling from this unit 365 days a year during the daylight hours. </p>
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<p class="v1MsoNormal"><br />Jason Szumlanski</p>
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<p class="v1MsoNormal"><span style="font-size: 10.0pt; font-family: 'Helvetica','sans-serif'; color: #333333;">Principal Solar Designer | Florida Solar Design Group<br />NABCEP Certified Solar Professional (PVIP)<br />Florida State Certified Solar Contractor CVC56956</span></p>
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<p class="v1MsoNormal"><span style="font-family: 'Helvetica','sans-serif'; color: #333333;">Florida Certified Electrical Contractor EC13013208</span></p>
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<p class="v1MsoNormal">On Thu, Jun 19, 2025, 6:15 AM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" rel="noreferrer">jason@floridasolardesigngroup.com</a>> wrote:</p>
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<p class="v1MsoNormal">I'm getting requests to install 4-6 panels for these mini-splits. I'm saying no so far, but it got me thinking... What are people doing for rapid shutdown for these systems? I can't see them being exempt. The manual is silent on the issue. It just shows a DC isolator from the panels to the point of connection in the unit. </p>
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