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Power & Energy
Forum Power banks for Home IT equipment - anyone used them?
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  • backup supply
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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
  • kmikemoo
    0 kmikemoo over 2 years ago

    shabaz  I used to have an APC UPS system on my home network.  Note the past tense.  We had a multi day outage a number of years back and that is when I learned that my cable and internet service provider didn't have backup for their distribution system.  While my home network functioned, there was no connectivity to the outside world.  I share this story because what I thought was a super cool system didn't turn out to be as cool as I thought.

    If I was going to do it again, I would opt for no AC output, just 12V (barrel jack and cigarette lighter output) and 5V USB.  The nice thing about the UPS was fast switching.  The Not Nice thing was the extra DC / AC / DC conversion.  Not efficient.  I'd get the car power supply and make it do double duty, car and home emergency power source.

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

    Hi Mike,

    Very useful info! I've had a discussion with some others here and the car battery idea is attractive, and using the AC inverter only where absolutely required.

    I've searched around and found a couple of USB 100W PD modules that accept ~12V input. I've ordered one from Aliexpress to test. I'll subject it to different input voltages and try to load it somehow (need to find a way to interface USB-C to an electronic load). I'll report back how it goes. If it works, then this solves the big part of this IT backup supply problem!

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

    Hi Mike,

    Very useful info! I've had a discussion with some others here and the car battery idea is attractive, and using the AC inverter only where absolutely required.

    I've searched around and found a couple of USB 100W PD modules that accept ~12V input. I've ordered one from Aliexpress to test. I'll subject it to different input voltages and try to load it somehow (need to find a way to interface USB-C to an electronic load). I'll report back how it goes. If it works, then this solves the big part of this IT backup supply problem!

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