4 ms·

Yes, you can save more than 30 pound per year by switching of standby devices. I just calculated it for my TV: https://www.wolframalpha.com/input?i=0.01+kwh+*+2

by tomthe 4y ago

Yes, you can save more than 30 pound per year by switching of standby devices. I just calculated it for my TV: https://www.wolframalpha.com/input?i=0.01+kwh+*+24+*365*++0.3+%E2%82%AC%2Fkwh https://www.wolframalpha.com/input?i=0.01+kwh+*+24+*365*++0.... which draws 10 W in standby (which I measured). It results in 25€ per year (I pay ca. 30 cent per kwh). I have lots of other standby devices.

Jaxan 4y ago
I measured almost all appliances in my house. And my TV uses around 9W in standby, so consistent with your finding. We don’t have a switch yet and I’m too lazy to (un)plug every time. So currently that is all wasted energy. Mobile phone chargers really don’t use much energy at all. So these can be left plugged in.
- djhworld 4y ago
  > And my TV uses around 9W in standby How old is your TV? EU regulations state that devices > 2013 must must not consume more than 0.5 Watts in standby or in off mode 9W is an egregiously high amount, maybe there's some setting or something that's keeping your device awake to be sapping 9W constantly?
  - Jaxan 4y ago
    We bought it last year. I think it is a model from 2019 or so. Perhaps something is keeping it awake indeed (it is connected to WiFi, and that is also how we use it: it is not connected by any cable). But there is not much to set up, unfortunately.
ben-schaaf 4y ago
That's a crazy amount of standby power consumption! That's more than my laptop under light usage and way more than a mobile phone even under heavy usage. I really hope this isn't common. As an aside, WA is awesome at units. You can simplify to: 10W years * 0.3 €/kwh.
- Jaxan 4y ago
  So I have the same (9W). It is crazy, especially since the usage when the TV is on is only 35W.
  - 2000UltraDeluxe 4y ago
    Many TV's have a small ARM computer running constantly in the background, regardless if the screen is on or not.
- cesarb 4y ago
  > That's more than my laptop under light usage and way more than a mobile phone even under heavy usage. Battery-powered devices (which include both laptops and mobile phones) are notoriously frugal with their power usage, since they have a severely limited power budget (even the biggest laptop batteries are limited to 100Wh because of the FAA, and mobile phone batteries are also limited by their physical size), and they are also compared on that power usage (you see on review sites things like "with the screen at half brightness and playing a nice movie, the battery lasted N hours..."). Wall-powered devices, on the other hand, are much less limited; the biggest restriction would be in places with 10A wall plugs at 110V (that's the case where I live, though "110V" is what the public calls it but it's actually 127V), and that's already over 1kW with no time limit. So wall-powered devices tend to not optimize their power usage (standby or otherwise) as much as battery-powered devices.
- electroly 4y ago
  Google can do it, too; try it with your example query. I find that more convenient because I can just type it into the address bar and it loads lightning fast, whereas WA is kinda slow. For simple math and unit conversions like this, WA's full power isn't necessary.
djhworld 4y ago
Said this in another comment from a another commenter saying their TV sapped 9W inb standy: how old is your TV? EU regulations state that devices > 2013 must must not consume more than 0.5 Watts in standby or in off mode

by tomthe 4y ago

Jaxan 4y ago

I measured almost all appliances in my house. And my TV uses around 9W in standby, so consistent with your finding. We don’t have a switch yet and I’m too lazy to (un)plug every time. So currently that is all wasted energy. Mobile phone chargers really don’t use much energy at all. So these can be left plugged in.

djhworld 4y ago
> And my TV uses around 9W in standby How old is your TV? EU regulations state that devices > 2013 must must not consume more than 0.5 Watts in standby or in off mode 9W is an egregiously high amount, maybe there's some setting or something that's keeping your device awake to be sapping 9W constantly?
- Jaxan 4y ago
  We bought it last year. I think it is a model from 2019 or so. Perhaps something is keeping it awake indeed (it is connected to WiFi, and that is also how we use it: it is not connected by any cable). But there is not much to set up, unfortunately.

ben-schaaf 4y ago

That's a crazy amount of standby power consumption! That's more than my laptop under light usage and way more than a mobile phone even under heavy usage. I really hope this isn't common. As an aside, WA is awesome at units. You can simplify to: 10W years * 0.3 €/kwh.

Jaxan 4y ago
So I have the same (9W). It is crazy, especially since the usage when the TV is on is only 35W.
- 2000UltraDeluxe 4y ago
  Many TV's have a small ARM computer running constantly in the background, regardless if the screen is on or not.
cesarb 4y ago
> That's more than my laptop under light usage and way more than a mobile phone even under heavy usage. Battery-powered devices (which include both laptops and mobile phones) are notoriously frugal with their power usage, since they have a severely limited power budget (even the biggest laptop batteries are limited to 100Wh because of the FAA, and mobile phone batteries are also limited by their physical size), and they are also compared on that power usage (you see on review sites things like "with the screen at half brightness and playing a nice movie, the battery lasted N hours..."). Wall-powered devices, on the other hand, are much less limited; the biggest restriction would be in places with 10A wall plugs at 110V (that's the case where I live, though "110V" is what the public calls it but it's actually 127V), and that's already over 1kW with no time limit. So wall-powered devices tend to not optimize their power usage (standby or otherwise) as much as battery-powered devices.
electroly 4y ago
Google can do it, too; try it with your example query. I find that more convenient because I can just type it into the address bar and it loads lightning fast, whereas WA is kinda slow. For simple math and unit conversions like this, WA's full power isn't necessary.

djhworld 4y ago

Said this in another comment from a another commenter saying their TV sapped 9W inb standy: how old is your TV? EU regulations state that devices > 2013 must must not consume more than 0.5 Watts in standby or in off mode