>My longer term project is running an entire workstation setup with multiple computers and multiple monitors from DC.
Yes, this is how the pro's do it. Although 48v is preferred due to much lower current for the same power means smaller conductors. https://www.datacenterfrontier.com/cloud/article/11431310/google-unveils-48v -data-center-rack-joins-open-compute Off the shelf ATX 48v power supplies are commonly available from the major vendors in the usual ATX for factors, here's an example: https://www.ebay.com/itm/Sunpower-SDX-250-48Volt-DC-250Watts-ATX-Power-Suppl y-New-bulk-pack/201838191205 AC adapters that run off 48v are fairly cheap: https://www.amazon.com/KRXNY-Inverter-Display-Output-Socket/dp/B082HJBM8L/ For a monitor that's normally not powered such as on a KVM switch it's worth the power loss in the converter to save the headache of having to buy a boost/buck converter to 19v Ted -----Original Message----- From: PLUG <[email protected]> On Behalf Of Bryan Vyhmeister Sent: Wednesday, June 12, 2024 4:09 PM To: Portland Linux/Unix Group <[email protected]> Subject: Re: [PLUG] Li-Po power station as ups Mine (the Anker SOLIX F3800) does talk about a UPS mode. I don't recall reading an actual millisecond value for transfer time but some YouTube reviews I watched mentioned a particular time and drew my attention to this issue. We happen to live in an area that has very frequent power outages and I plan to use the power station to keep the house running and not particularly to run my routers, switches, and computers but I wanted to test the possiblity anyway. I'm not sure what times prevent rebooting of equipment but the best solution, and the one I am working on now, is to run my important equipment directly from some Renogy AGM batteries (2 x 100 Ah in series for 24V in my case) and then charging those batteries through the power station so nothing ever reboots. I am personally using a Minn Kota 2 battery charger to charge the AGM batteries although I have chargers for 1 and 4 batteries as well. I am also running everything on DC directly rather than through an inverter to get the maximum power efficiency I can. My initial project that I am almost done with is running my routers, switches, and a couple of servers direct from one set of batteries. My longer term project is running an entire workstation setup with multiple computers and multiple monitors from DC. I'm still working on this but am using motherboards that can run from direct DC (Supermicro X11SSZ-F, X11SSZ-TLN4F, X11SCZ-F, and X13SAZ-F are particular examples I have but other boards also have the capability like the A1SAi and A1SRi series which make nice routers) and then using DC PSUs as linked below to provide stable 12V from a wider voltage range (like 24V battery banks). https://www.mini-box.com/DCDC-USB?sc=8&category=981 https://www.mini-box.com/DCDC-USB-200?sc=8&category=981 Alternately, you can also use the PicoPSU units from the same site above to adapt regular motherboards expecting ATX PSUs to direct DC as well. The biggest potential issue is high power needs of your configuration. As a result, I have been picking up low power CPUs on eBay like the T version of Intel Core series CPUs and L version of Xeon CPUs (i.e. Core i3 4360T, Core i3 7100T, Xeon E3 1240L v5, Xeon E-2278GEL, Core i7 12700T for example) to keep the power consumption low regardless. Intel's site is your friend here to find the TDP values of these CPUs. The highest TDP I am considering is 65W but 25W, 35W, and 45W TDP values are preferred. https://ark.intel.com I have been researching monitors and found a number of LG models that have external power bricks as well as some HP models as well. Other companies make some as well but I have settled on the HP U28 or U32 models which are relatively reasonably priced and are nice 4K monitors. Most of these take 19V power which the above DC PSU device I linked can output from what I understand. I have yet to start on the monitor portion yet but will get there. Anyway, that's more than you were asking but that's my thinking at this point. I have been researching lots of home lab configurations and some are using 240V power for greater efficiency which comes with a lot of other costs to make work. I have decided to run everything from DC power (mostly 24V at this point) which also goes along with trying to be more off grid. Bryan On Wed, Jun 12, 2024 at 03:47:18PM -0400, Tomas Kuchta wrote: > May I ask - does your particular power station model advertise UPS > mode with a transfer time? > > The specific models reviewed in the link all advertise UPS mode with > the transfer times. Some sorter than others. > > Just curious - whether one can rely on documented technical spec when > chosing device. > > Thanks, Tomas > > On Wed, Jun 12, 2024, 00:35 Bryan Vyhmeister <[email protected]> wrote: > > > I bought an Anker SOLIX F3800 with extra battery but the transfer > > time is a little too long so all my equipment reboots when it > > switches to battery. That's really not ideal and can be a problem > > for these "Power Stations." I did buy the Anker SOLIX Home Power > > Panel which is an automatic transfer switch and have yet to install > > that which might improve the situation but I wanted to mention the > > issue since it is a common one. > > > > Bryan > > > > On Tue, Jun 11, 2024 at 01:21:25PM -0700, Ted Mittelstaedt wrote: > > > Spendy buggers! > > > > > > I suspect a "power station" is just a renamed UPS with $300 added > > > to the > > price! > > > > > > Ted > > > > > > -----Original Message----- > > > From: PLUG <[email protected]> On Behalf Of Tomas > > > Kuchta > > > Sent: Tuesday, June 11, 2024 12:45 PM > > > To: Portland Linux/Unix Group <[email protected]> > > > Subject: [PLUG] Li-Po power station as ups > > > > > > Bunch of times we discussed not lead acid UPS options. > > > > > > I came across this test site looking at the topic and testing some > > > of > > the power stations as UPS. > > > > > > > > https://www.storagereview.com/review/portable-power-stations-actuall > > y-work-pretty-well-as-a-ups > > > > > > This looks like a real option when my lead acid batteries go south. > > > > > > Hope it is useful, > > > Tomas > > > > >
