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Thanks all for the votes. I was able to deploy the 2nd UPS
yesterday. Here are the pix of the UPS install:<br>
<br>
<a class="moz-txt-link-freetext" href="https://photos.app.goo.gl/x9mikv86zNYhrzV3A">https://photos.app.goo.gl/x9mikv86zNYhrzV3A</a><br>
<br>
--Bart<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/5/2021 12:41 PM, Bart Kus wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1f6f9985-856f-687a-83bc-f0bf523341c0@bartk.us">
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Hello,<br>
<br>
During the recent wind storm event in January, HamWAN lost utility
power to some sites. This triggered network outages that affected
users and repeaters that relied on those sites. It was far from
our finest hour. "When all else fails", HamWAN should not be the
first in line. I'd like for 2021 to be a year we focus on
reliability. Having a reliable power system at every site seems
like a good place to start that journey. In each of the power
failures in January, a generator system failed to activate. In
these cases, we need at least 24 hours to mount a response in
fixing generators. This means our battery backup systems should
be sized for at least 24 hours of runtime. I have acquired a
couple UPSes that can achieve this. They are composed of the main
UPS:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-3000VA-120V-Rackmount-Tower/P-SUM3000RMXL2U"
moz-do-not-send="true">https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-3000VA-120V-Rackmount-Tower/P-SUM3000RMXL2U</a><br>
<br>
And one external (and chainable!) battery expansion module:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-48V-Extended-Run-Battery-Pack/P-SUM48RMXLBP2U"
moz-do-not-send="true">https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-48V-Extended-Run-Battery-Pack/P-SUM48RMXLBP2U</a><br>
<br>
They also feature an AP9631 network interface module in each UPS,
so we can monitor and control the power system. As you can see,
each UPS costs about $3600 new, so the two I acquired would be
$7,200 new. However, I managed to find used units and purchased
brand new batteries for them. <b>The total cost for these two
systems is $963.71.</b> One of them is deployed at Rattlesnake
("Snoqualmie shack") already:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://photos.app.goo.gl/HTomAzJUnrjuJ3bw8"
moz-do-not-send="true">https://photos.app.goo.gl/HTomAzJUnrjuJ3bw8</a><br>
<br>
If we ever want to expand the battery capacity of these, we can
simply plug in more battery modules.<br>
<br>
I'm hoping to deploy the 2nd system in the other building on
Rattlesnake ("DNR shack"), but that hasn't happened yet.<br>
<br>
--Bart<br>
<br>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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