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Power & Energy
Forum Power banks for Home IT equipment - anyone used them?
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  • backup supply
  • power bank
Related

Power banks for Home IT equipment - anyone used them?

shabaz
shabaz over 2 years ago

Several friends have been discussing the need to be prepared when/if there are power outages in the UK in Winter or Spring.

Our assumption is that the outage would not be longer than a day. Some of the battery backup systems cost thousands, which could be justified (say) over a 5-year life period, but it's unrealistic in the UK to want to be prepared with a backup source for 5 years for the home, given that any power outages won't be very frequent. Granted that backup systems could be used to obtain cheap(er) electricity at off-peak times, but it is hard to predict if the savings will be that significant enough to justify the big up-front expense commitment.

A generator is unattractive because of the noise, but we are open to it, but would definitely prefer a battery solution. Cooking food with an electricity source isn't too important; if there isn't natural gas connection in the kitchen, then camping gear could be used.

Then we noticed there are power banks. Some are in the $200 price range, many are $300-$500, and there are others circa $1000 and beyond.

There are lots of obscure power bank products such as the one below. It's a lot of energy to keep in a home, so whatever is used needs to be safe.

image (Image source: Amazon)

Backup lighting sources are cheap; there are even power tool ecosystems that use the same battery for task lights, so they could be used in a pinch. Not elegant, but it gets the job done at low cost.

However, we were not sure how to deal with IT equipment. Routers/DSL modems are straightforward because they operate from 12V or 5V and a backup supply is easily rigged up for that.

For laptops, it could be attractive to have a backup supply that offers USB Type C output, since many laptops (or lower power chromebooks) have a USB-C socket for power nowadays.

Any battery banks, or other backup scheme, that people can recommend? It would be nice to be able to charge (and run) laptops and power and charge anything that uses a USB connector. Perhaps a minimum of 100W power support would be needed, although really several hundred W would be preferred, so that a couple of laptops could be run, iPad, phones charged and so on. An additional 12V output would be a nice-to-have, to charge up or operate other devices. AC mains output is not essential. Hot-standby is not essential either, since a laptop will continue to run on its own battery while power connections are swapped. 

Any comments/ideas appreciated!

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Top Replies

  • rsjawale24
    rsjawale24 over 2 years ago +4
    I have fibre optic broadband at home. When it was first installed around 6 years back, I was surprised to see that the ONT had it's own 12V 6Ah battery supply for power outages. The power supply is quite…
  • three-phase
    three-phase over 2 years ago +4
    I use a 500wh portable station from Power Oak. I have had it a few years now and have not had any issues with it. I use it a lot on sites for powering test apparatus when there is no power close by. I…
  • vishwasn
    vishwasn over 2 years ago in reply to shabaz +4
    As a DIY solution to the WiFi router backup issue, I made this scalable battery bank using the 18650 cells and a BMS. Since required voltage is 12V. It is easy to have 3S balancer directly connected to…
Parents
  • phoenixcomm
    0 phoenixcomm over 2 years ago

    Shabaz imagepersonly a 100w anything is way too small. A solution for you would be to roll your own. and then you will need a lot of batteries. I used to own, a large HP UPS I think its output was ~ 2000watts, and it had two rackmount units, one for the electronics, and the other for the batteries. together the unit was about 10" tall and used to sit at the bottom of my rack. this beast using keep my Cisco 7000 router. The two thick cables ran to two separate Adtram ISDN DSUs. The pic was taken when I started building out, when I was finished I think I had 8 DSU in total. 3 of them were private, to get more bandwidth we had a total of 4 DSUs bonded together at my upstream ISP. The USPs held up a lot of stuff. Including JAVA Stack Server (middle pic) and my Nortel phone switch. I remember we had a power outage that lasted over 6hrs and I was out when it happened I was out at a meeting. when I can back the light where out but there was a racket coming from my garage. It was my UPS I shut it down as my servers were on the other side of my house.  I made dinner on the gas stove and about 2 hrs later the power came back on.  After I reset all the computers I walk back to the garage and turned my UPS back on. ( prior to 2005)

    imageimage

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  • phoenixcomm
    0 phoenixcomm over 2 years ago

    Shabaz imagepersonly a 100w anything is way too small. A solution for you would be to roll your own. and then you will need a lot of batteries. I used to own, a large HP UPS I think its output was ~ 2000watts, and it had two rackmount units, one for the electronics, and the other for the batteries. together the unit was about 10" tall and used to sit at the bottom of my rack. this beast using keep my Cisco 7000 router. The two thick cables ran to two separate Adtram ISDN DSUs. The pic was taken when I started building out, when I was finished I think I had 8 DSU in total. 3 of them were private, to get more bandwidth we had a total of 4 DSUs bonded together at my upstream ISP. The USPs held up a lot of stuff. Including JAVA Stack Server (middle pic) and my Nortel phone switch. I remember we had a power outage that lasted over 6hrs and I was out when it happened I was out at a meeting. when I can back the light where out but there was a racket coming from my garage. It was my UPS I shut it down as my servers were on the other side of my house.  I made dinner on the gas stove and about 2 hrs later the power came back on.  After I reset all the computers I walk back to the garage and turned my UPS back on. ( prior to 2005)

    imageimage

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  • shabaz
    0 shabaz over 2 years ago in reply to phoenixcomm

    Hi Cris,

    This is great info, and nice to see the photos of your gear! The 7000 series I didn't get to use, but the 7200 were super-feature-rich devices, I think they may have been similar. 

    Interesting that the entire 2kW backup solution was just 10" tall. That's more compact than I expected, which does enable it to be very feasible for home use.

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  • phoenixcomm
    0 phoenixcomm over 2 years ago in reply to shabaz

    shabaz do yourself a favor and go for marine deep discharge batteries. If you go with volt units wire them in SERIES for 48vdc. Much more efficient than 12vdc. if you trying to get to 120vac but then again you may want 230vac (if you live across the pond. A lot of electronics that I used to use had a 48vdc input. 

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  • shabaz
    0 shabaz over 2 years ago in reply to phoenixcomm

    I see.. that's good to know. I'll research what I can find here. These look to be a reasonable price, and available (currently at least! there may be a rush to purchase batteries toward winter perhaps): https://www.yuasa.co.uk/rec50-12.html

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