Interesting. Will check that out.
On 12/20/2019 11:21 AM, TJ Trout wrote:
You can float them dumb, but you *should* add a cell balancer which
keeps each cell within range, they cost between $10-100 per site and
aren't complicated to install, just goes to each terminal to read each
cells voltage and keep it within range.
On Fri, Dec 20, 2019, 5:59 AM <ch...@wbmfg.com
<mailto:ch...@wbmfg.com>> wrote:
I am laboring under that same assumption.
*From:* Adam Moffett
*Sent:* Friday, December 20, 2019 7:09 AM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Outdoor UPS
I didn't think you could put Lithium on a dumb float charger. I
thought they needed special electronics. I'm happy to be educated
if I'm wrong there.
On 12/19/2019 8:06 PM, TJ Trout wrote:
Whatever you do don't use lead acid lithium batteries of varying
chemistry's are available second-hand extremely lightly-used for
the exact same price per watt hour and they will last long enough
to put them in your will
On Thu, Dec 19, 2019, 10:50 AM Adam Moffett <dmmoff...@gmail.com>
wrote:
Good point, I'll have to confirm that with them.
On 12/19/2019 3:39 PM, Ken Hohhof wrote:
I hope that Edgepoint doesn’t fry if the input is 1 or 2
volts above 54 VDC.
If it sees the unregulated battery string voltage, normally
you want an upper limit of 56 volts. 60 would be even better.
*From:* AF mailto:af-boun...@af.afmug.com *On Behalf Of
*Adam Moffett
*Sent:* Thursday, December 19, 2019 2:25 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Outdoor UPS
I could live with either AC or 48V, but 48V would be convenient.
I'm looking at the Ubiquiti EdgePoint EP-S16. It takes a
54V DC input, has SFP+ uplink ports and twelve 802.3af/at
ports. I don't actually expect to use every port, but in
theory you could load that up to over 300W, and if I make
sure to size the UPS for the switch then it's more idiot
proof when people come along and add stuff.
Ubiquiti has a 54V UPS module now, and you can put in 2+0
150W power supplies for 300W total, but it's an indoor case
and operating temp only down to 0c. By the time I put that
in a heated outdoor box it doesn't look too attractive anymore.
I'm very familiar with the Traco and similar products. It
would just be hard to beat $650 for a complete system using
modular DIN components in a box. There's also something to
be said for the simplicity of one part on the BOM.
Of course I could use the smaller EdgePoint, but then I
don't have the 10Gig uplink.
I'm checking with Cyberpower on what happens in an overload
condition...maybe the guy who adds one AP too many will
realize his mistake very quickly.
-Adam
On 12/19/2019 3:05 PM, Ken Hohhof wrote:
You are looking at 48VDC output, or AC with a 48V
battery string?
Note that unit seems to have around 700 watt hours of
batteries, not bad, but if you are running 300W or 600W
of loads, it’s not going to give you much runtime
without adding more batteries.
We have a couple Alpha Micro350 systems at some small
sites, which looks physically similar, but that’s AC
output. We only use them at small sites because it’s
not enough batteries for a large site. Normally we would
put a Traco TSP BCM48 and a TSP360-148 or TSP600-148 in
the same enclosure with our other DIN rail equipment and
maybe a bunch of 100 Ah batteries in a separate battery
box. Or maybe 4 x 22 Ah batteries in the same
enclosure, if we don’t need a lot of runtime.
*From:* AF mailto:af-boun...@af.afmug.com *On Behalf Of
*Steve Jones
*Sent:* Thursday, December 19, 2019 1:33 PM
*To:* AnimalFarm Microwave Users Group
mailto:af@af.afmug.com
*Subject:* Re: [AFMUG] Outdoor UPS
hes building out UPS in a box
On Thu, Dec 19, 2019 at 1:30 PM Adam Moffett
<dmmoff...@gmail.com> wrote:
Is there a particular item I should ask him about?
On 12/19/2019 2:22 PM, Steve Jones wrote:
talk to matt at CTI
On Thu, Dec 19, 2019 at 12:27 PM Adam Moffett
<dmmoff...@gmail.com> wrote:
https://www.cyberpowersystems.com/product/fttx/outdoor/cs150u48v3/
I tripped over this guy the other day.
They're $650-700 retail and
frankly, that's really not a bad price for a
one-and-done 48V outdoor
power system.
<whining>
....but 150W is pretty small. I wish there
was a 300W or 600W option.
Why does it seem like every product I want
is a white whale and that
every vendor has something that's like 90%
of the way there, but not
quite perfect?
</whining>
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