[HamWAN PSDR] VOTE: Power backup expansion project

[Bart Kus]

Thanks all for the votes.  I was able to deploy the 2nd UPS yesterday.  
Here are the pix of the UPS install:

https://photos.app.goo.gl/x9mikv86zNYhrzV3A

--Bart


On 2/5/2021 12:41 PM, Bart Kus wrote:
> 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-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-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
>
> 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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