[time-nuts] Lady Heather on a Laptop

[Peter Gottlieb]

Most recent bill in MA:

Supply is 6.72 cents/kWh and delivery is 6.60 cents/kWn for a total of 13.32 
cents/kWh.  This is much less than I was paying in NY where it was hovering 
around 30 cents/kWh (I remember 32 one summer month).

Peter


On 9/27/2012 6:10 PM, Charles P. Steinmetz wrote:
> Chris wrote:
>
>> After some measuring my general run of thumb is "Anything you
>> leave plugged in and running 24x7 will cost you triple digits of
>> dollars (at least) over a year
>
> Well, that's a lot of "anything."  There are 8760 hours in a year, so a 1 kW 
> load will consume 8760 kWH per year.  We pay about $0.08 per kWH here, so a 1 
> kW load running 24/7 costs just over $700/year (= $0.70 per W per year).  That 
> puts the "three digit" point ($100/yr) at ~143 W.  I leave a number of LED 
> bulbs running 24/7, which cost ~$2.80/yr for 4 W, ~$5.60/yr for 8 W, and 
> ~$8.40/yr for 12 W.  Even a new 50" flat-screen television (119 W) would only 
> cost ~$83/yr if left on 24/7, and my quad-core workstation with its huge 
> display would cost only ~$250.
>
> In another post you mentioned $0.21/kWH (you must be in California?), so 
> adjust all of these by a factor of 2.625 for your location -- but I think the 
> service rates in most of the US are closer to ours than to yours).
>
> Best regards,
>
> Charles
>
>
>
>
>
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