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<div id="signature">At that age, abandon system and use gas! I sure would not want to do this at 70, let alone 80.</div>
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<div>Keep it simple or you will be the one in the crosshair!<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 2025-06-17 7:28 am, jay via RE-wrenches wrote:</p>
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<div id="replybody1" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">All of these options would be possible for someone younger and able, but the client is early 80's and she wants it to work correctly without having to do the manual cover/uncover which given the collector area, elevation and temps etc isn't an option.
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<div>Which means please let me know of a good resource for solar thermal products. </div>
<div>Specifically I need to convert this to a drain back system. </div>
<div>I'll need the drain back tank and new pump station </div>
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<div>thanks</div>
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<div>jay<br />
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<div>On Jun 15, 2025, at 8:35 PM, Bradley Bassett via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:</div>
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<div dir="ltr">When I found that my system was somewhat oversized, I plumbed in a mixing valve and a heat dump radiator (a few Cu pipes) in the crawl space to dump the heat. It's on the solar supply line and it works like a charm. It actually adds a very modest amount of heat to the crawl space, not enough to notice. It's going on 20 years without any issues, probably because it's an anti-freeze system so no mineral buildup in the mixing valve. I've also heard of using a fin radiator under the eve for this instead of the crawl space. The crawl space was easier for me.
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<div>Brad Bassett</div>
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<div class="v1gmail_attr" dir="ltr">On Sun, Jun 15, 2025 at 5:02 PM david quattro via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
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<div dir="auto">There must be a variable mixing valve that is informed and controlled by a thermocouple</div>
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<div class="v1gmail_attr" dir="ltr">On Sun, Jun 15, 2025 at 4:46 PM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
<blockquote class="v1gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;">Hi all<br /><br />I've inherited an incorrectly sized solar thermal evacuated tube system. <br />It's too many tubes for the use most of the year. <br /><br />Does anyone know of a design or product that can remotely cover them? <br />I can find shade cloth of course that I can cover them but something remote control would be better <br /><br />Thx<br />Jay<br /><br /></blockquote>
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