[HamWAN PSDR] VOTE: Power backup expansion project

[David C. Jenner]

Doesn't Buck Mtn run on generators all the time?  With maybe 6 months or 
more fuel?

73,
Dave
K7DCJ


On 2/5/21 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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