that article manipulates numbers comparing 1 in number of people vs 1 in number of lithium batteries. I know zero people who have been lightning struck and a handful who have had lithium batteries catch fire You're far more likely to be struck by lightning (1 in 1,042,000) than ever see a battery flame up (1 in 10 million is the number experts tend to quote).
On Fri, Dec 20, 2019 at 11:48 AM Ken Hohhof <af...@kwisp.com> wrote: > Get the non exploding type? > > https://www.cnet.com/news/the-lithium-ion-battery-that-didnt-explode/ > > > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Adam Moffett > *Sent:* Friday, December 20, 2019 11:39 AM > *To:* af@af.afmug.com > *Subject:* Re: [AFMUG] Outdoor UPS > > > > 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> 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 <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 <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 > <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> > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > ------------------------------ > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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