If you are looking for one that small (I’m not sure exactly the size of mine - it may be smaller) you can have it for free.
It has just sat in a box, so I don’t know if the battery is any good, but the electronics should still be fine. You just have to pick it up. I’m in Orange County. - Mark Sent from my Fuel Cell powered iPhone > On May 23, 2021, at 6:52 PM, Jim Walls via EV <ev@lists.evdl.org> wrote: > > On 05/23/2021 18:16, Peri Hartman via EV wrote: >> Somewhat off topic... >> >> For some time, I've been meaning to get a small UPS to power my router, >> laptop, and other electronics in case of an emergency. Well, our power will >> be off monday for utility work and so I bought a small UPS. But, I'm >> disappointed with it. > > Most small consumer UPSes are good for 15 - 20 at their rated load (when the > battery is new). Yes, that varies A LOT. Based on your around 100 WH, that > would make it about right for a 250 - 300 VA UPS (a quite small one). Yes, > you can usually connect a larger battery, but be a little careful. Most of > these consumer UPSes were not designed to operate in inverter mode for long > periods of time. As a result, they can't handle the heat from an extended > run time at anywhere close to rated load. Same problem on battery recharge - > it is going to be asked the charge for a far longer time than expected so > again, heat can be an issue. Heat is generally not that hard to deal with > with some forced cooling, but that may or may not totally mitigate the > problem. This computer is being powered by a 1500VA APC UPS that has about > 50AH at 24 volts of external battery, but under worst cast, the load is only > about 300 watts. > > There are more professional inverters that will happily run forever in invert > mode For example, we are running a bunch of these in a public safety > environment at work where they run in invert mode 24x7 essentially forever. > These can also run with AC input in either AC preferred or DC preferred. > Note, this is just the inverter. You supply the battery plant (we have 3,600 > AH at 48 volts in a bunch of places - that's about 5 tons of lead). > https://www.amazon.com/gp/product/B07C3BKZ2F/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 > > -- > 73 > ------------------------------------- > Jim Walls - K6CCC > j...@k6ccc.org > Ofc: 818-548-4804 > http://members.dslextreme.com/users/k6ccc/ > AMSAT Member 32537 - WSWSS Member 395 > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
