The only thing for this vote is in bold, below. It's just for the 2 UPSes already purchased. If HamWAN doesn't want to fund it, I'll eat it out of pocket or sell the equipment. --Bart On 2/5/2021 6:00 PM, Rob Salsgiver wrote:
So the subject line calls for a vote, but I don’t see any specific thing we’re voting for….
Are we reimbursing you for the 2 UPS units, committing to the same flavor at an undetermined number of sites, or just the idea to implement backup power at much needed sites?
I’m not against any of it, just want to know what specifically we’re to vote on!
Cheers,
Rob
*From:*PSDR [mailto:psdr-bounces@hamwan.org] *On Behalf Of *Bart Kus *Sent:* Friday, February 5, 2021 12:42 PM *To:* Puget Sound Data Ring *Subject:* [HamWAN PSDR] VOTE: Power backup expansion project
Hello,
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:
https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-3000VA-120V... <https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-3000VA-120V-Rackmount-Tower/P-SUM3000RMXL2U>
And one external (and chainable!) battery expansion module:
https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-48V-Extende... <https://www.apc.com/shop/us/en/products/APC-Smart-UPS-XL-Modular-48V-Extended-Run-Battery-Pack/P-SUM48RMXLBP2U>
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. *The total cost for these two systems is $963.71.* One of them is deployed at Rattlesnake ("Snoqualmie shack") already:
https://photos.app.goo.gl/HTomAzJUnrjuJ3bw8 <https://photos.app.goo.gl/HTomAzJUnrjuJ3bw8>
If we ever want to expand the battery capacity of these, we can simply plug in more battery modules.
I'm hoping to deploy the 2nd system in the other building on Rattlesnake ("DNR shack"), but that hasn't happened yet.
--Bart
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