<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">It\u2019s a good idea to go with ac fan.</div><div dir="ltr">Simple and easy </div><div dir="ltr">And there isn\u2019t any charging if the inverter goes down. </div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Jun 3, 2025, at 3:52\u202fPM, Jerry Shafer via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="auto"><p dir="ltr">Wrenches, Dave, <br>
</p><p dir="ltr">I have had success with CPU fans, 12,24,48 vdc, 120 vac use no power and run them through a thermostat set at 80 to 90 degrees </p><p dir="ltr">Fun times</p></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Jun 3, 2025, 1:30\u202fPM Roy Butler via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div>
<font size="2">Dave,<br>
<br>
The Morningstar Relay Driver can work as a stand alone unit, it
can derive it's power from the battery bank.<br>
This allows it to be programmed for voltage based relay operation
which is ideal for vent fan applications.<br>
<br>
The relay channels are dry contacts and have a current limit of
750mA. This will run a fan somewhat larger<br>
than the good old Zephyr vents.<br>
</font><br>
<pre cols="72">Roy Butler
Four Winds Renewable Energy, LLC
<a href="https://www.google.com/maps/search/8902+Route+46?entry=gmail&source=g">8902 Route 46</a>, Arkport, NY 14807
607-324-9747
Education is when you read the fine print; experience is what you get when you don\u2019t.
\u201cThe less people know, the more stubbornly they know it.\u201d
Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.
</pre>
<div>On 6/3/2025 2:22 PM, Dave Tedeyan via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi all, </div>
<div><br>
</div>
<div>What are people using these days for venting a good ol' 48v
flooded lead acid battery box? I am upgrading an off grid
system. There is a one year old set of flooded lead acid
batteries, so those will stay, but everything else will be
new. I plan on using a Sol-Ark inverter. The existing battery
box does not have any active ventilation, so I would like to
add some. In the past, I have used the Zephyr Power Vent Fans,
like this one:</div>
<div><a href="https://www.thesolarbiz.com/zephyr-power-vent-fan-for-48-volt-battery-systems.html" target="_blank" rel="noreferrer">https://www.thesolarbiz.com/zephyr-power-vent-fan-for-48-volt-battery-systems.html</a></div>
<div>They don't seem readily available, but I think I can find
one somewhere.</div>
<div><br>
</div>
<div>More importantly, what would you use to control this?
Sol-Ark inverters do not have any kind of relay for it. I have
found external controllers in the past (Yandina LLC Vent
Control), but I cannot seem to find any right now. There is
one noted in the fan documentation (Solar Converters,
Inc. VCS1AH), but that does not seem available anywhere right
now. Does anyone have a recommendation for either a vent fa
controller or a whole venting solution?</div>
<div><br>
</div>
<div>Thanks!<br>
-Dave</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">
<div dir="ltr"><br style="color:rgb(34,34,34)">
<div dir="ltr" style="color:rgb(34,34,34)">
<div dir="ltr">
<div dir="ltr">
<table style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:525px;font-size:11pt;font-family:Arial,sans-serif" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td rowspan="6" style="padding:0px 10px 0px 0px;font-size:10pt;border-right:1px solid rgb(236,189,0);width:125px;vertical-align:top" width="125" valign="top"><a href="https://www.sungineersolar.com/" style="color:rgb(51,122,183);background-color:transparent" target="_blank" rel="noreferrer"><img alt="Logo" src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png" style="border:0px;vertical-align:middle;width:105px;height:auto" width="105" border="0" data-unique-identifier=""></a></td>
<td style="padding:0px 0px 0px 10px">
<table style="border-spacing:0px;border-collapse:collapse;background-color:transparent" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td style="padding:0px 0px 5px 10px;width:400px;vertical-align:top" valign="top"><span style="color:rgb(236,189,0);font-size:11pt;font-weight:700">Dave
Tedeyan, P.E.<br>
</span><span style="font-size:11pt;font-weight:700"><font color="#ecbd00">Owner |
Sungineer Solar</font><br>
</span></td>
</tr>
<tr>
<td style="padding:5px 0px 5px 10px;font-size:10pt;vertical-align:top;line-height:17px" valign="top"><span style="color:rgb(236,189,0)"><span style="font-weight:700">p: </span></span><span style="font-size:10pt;color:rgb(0,0,0)">he | him | his</span><span style="color:rgb(236,189,0)"><span style="font-weight:700"><br>
a: </span></span><span style="font-size:10pt;color:rgb(0,0,0)"><a href="https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g">1653 Slaterville Rd.</a></span><a href="https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g"> </a><span style="font-size:10pt;color:rgb(0,0,0)"><a href="https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g">| Ithaca, NY 14850</a></span><br>
<span style="color:rgb(236,189,0)"><span style="font-weight:700">w:</span></span><a href="http://www.sungineersolar.com/" rel="noopener noreferrer" style="color:rgb(51,122,183);background-color:transparent" target="_blank"><span style="font-size:10pt;color:rgb(0,0,0)"> www.sungineersolar.com</span></a><br>
<span style="color:rgb(236,189,0)"><span style="font-weight:700">c:</span></span><span style="font-size:10pt;color:rgb(0,0,0)"> (607) 270-0370</span></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
<pre>_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: <a href="http://re-wrenches.org" target="_blank" rel="noreferrer">http://re-wrenches.org</a>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank" rel="noreferrer">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
There are two list archives for searching. When one doesn't work, try the other:
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" target="_blank" rel="noreferrer">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank" rel="noreferrer">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a href="http://www.re-wrenches.org/etiquette.htm" target="_blank" rel="noreferrer">http://www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a href="http://www.members.re-wrenches.org" target="_blank" rel="noreferrer">http://www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
</div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div>
<span>_______________________________________________</span><br><span>List sponsored by Redwood Alliance</span><br><span></span><br><span>Pay optional member dues here: http://re-wrenches.org</span><br><span></span><br><span>List Address: RE-wrenches@lists.re-wrenches.org</span><br><span></span><br><span>Change listserver email address & settings:</span><br><span>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</span><br><span></span><br><span>There are two list archives for searching. When one doesn't work, try the other:</span><br><span>https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</span><br><span>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</span><br><span></span><br><span>List rules & etiquette:</span><br><span>http://www.re-wrenches.org/etiquette.htm</span><br><span></span><br><span>Check out or update participant bios:</span><br><span>http://www.members.re-wrenches.org</span><br><span></span><br></div></blockquote></body></html>