How much electricity is it really wasting?, and would it not be better to switch off the 4 lights in the room?
The best way to compare the cost of running different appliances is to look at their power consumption, which is measure of how much power they use in Watts. The following list points out typical values for the wattage of some devices you would find in your home so that you can compare them.
|100W light bulb (Incandescent)||100W||100W||0W|||
|25" colour TV||150W||150W||N/A|
|3" belt sander||1000W||1000W||N/A|
|60W light bulb (Incandescent)||60W||60W||0W|||
|9" disc sander||1200W||1200W||N/A|
|Cordless Drill Charger||70W||150W||N/A|
|Electric Heater Fan||2000W||3000W||N/A|
|Fridge / Freezer||150W||400W||N/A|
|Hair Blow dryer||1800W||2500W||N/A|
|Home Air Conditioner||1000W||4000W||N/A|
|Home Internet Router||5W||15W||N/A|
|Hot Water Immersion Heater||3000W||3000W||N/A|
|Inverter Air conditioner||1300W||1800W||N/A|
|LED Light Bulb||7W||10W||0W|||
|Smart Phone Charger||4W||7W||N/A|
|Submersible Water Pump||400W||400W||N/A|
|TV (19" colour)||40W||100W||1W|||
|Water Filter and Cooler||70W||100W||N/A|||
An important point is also to bear in mind the length of time for which the device will be used. For example an electric blanket may be used for 2 hours, but a hair drier for 5 minutes. Therefore the blanket uses 200W * 2 hours = 0.4kWh. The hair drier uses 2KW * 0.0833hours = 0.1666kWh. So using the blanket costs roughly 2.5 times as much as the hair drier.
All values reported here are estimates, you should check the appliance labels or literature to find out the correct power consumption.
Further Reading and Relevant Articles
Some relevant online articles for further information and reading.
Comments For This Page
Water Dispenser has been added
By Daft Logic on 13th April 2018
What about water dispenser
By Pradeep Joshi on 12th April 2018
this house doesn't have fridge
By aa on 13th March 2018
Do Ecg officers delete previous readings from the meter before reading current one or they continue from the previous month and subtract the current one from it? I want to know please.
On 16th January 2018
Thankyou for this Site it has been a help.
In the last year I upgraded my appliances etc cut down standbys and total power.Just 2years ago switched all house lights from 24w Energy saver to 8/10 w LED which cut the yearly power 7818 KWH to 6943KWH just on changing over to LED Lights. I have used the Clever watts meter to determine individual useage of appliances
Then upgraded appliances and in last year from 6943KWH to an unbelievable 2863KWH.There have been improvements in Appliances over the year.
The Major was changing the Immersion water heater (3300Watts) to an inverter water heater (1250Watts) Taking the waterheating Useage from 3509 to 1287 (saving2222KWH) for the year.An older LCD38 in TV (Useage 236w and Standby 17w) to LG 49in TV HD(Not UHD) 38w and standby 1W at average 5hrs a day from 548KWH to 78KWH per year saving 1470KWH, An old 1990s fridge to samsung INVERTER FRIDGE similar size From 1600w per day to 492w (That is from 584KWH to 182KWH per year saving . Standby for microwave 4w. I went through and put items on standbys on two surge boards , ones that could be turned off and ones that needed to stay all the time eg Broadband Fibre.All these appliances have a pay back time of about 10years each before the power savings equal the cost.There are still opportunies for further reductions as we have an old air conditioner efficiency of 2.70 whereas newest ones can have a COF near 5.Even the inverter water heater further savings are being made by having a timer on it saving 17hours a day of the 19w standby power.At present we are saving 4955 KWH per year before LED and without a solar panel in sight.There were other small improvement, I had a fan heater for a small room in winter 2400W now use a $10 400W Halogen heater instead.Appliances have changed since the data collected in 2008
By Papa2towa on 6th January 2018
Computers can use much more power. My personal PC has drawn up to 600W from the wall, and I know some who have seen it go to 1000W .
By Will on 19th December 2017
Watts are watts . 100 watts used for 1 hour is 100 watt hour or 0.1 kilowatt hours. For 1 day...multiply by 24 hours...
Equals 2.4 kilowatts.
On 19th November 2017
The unit is not watt per hour, its watt hour where 1kwh is one unit as mesured by the electricity distribution companies, so it can be used to calculate how much expenditure an appliance will cause.
On 19th October 2017
How much should a land lord charge per point
By snit on 14th October 2017
Will a good quality 1100W inverter supported by two 8D AGM batteries handle the startup and operating draw of the typical American made upright refrigerator having the Energy Star rating?
By A Andrews on 9th October 2017
Hi Pete. This is not a professional opinion, but it seems solar panel inverters do have a 'no load consumption'. This can be up to 30W, so if it is on 24hours per day, this is 720 Wh
In terms of wear and tear or any other adverse effects to switching it on and off ... not sure, perhaps you can ask the manufacturer.
Some models have a sleep mode to switch to a low power mode when there is no load detected.
By Daft Logic on 9th October 2017
I have Solar Panels that use an invertor, This is warm 24/7. Any idea how much it uses at night and is it worth switching it off from dusk to dawn or would this cause wear & tear?
By Pete E on 9th October 2017
Hot Water Immersion Heater has been added.
By Daft Logic on 4th October 2017
Could you add a Hot water emersion heater please
On 4th October 2017
these information is very useful in completing my physics project work given in school on electricity bill.
Thank you !
By prvk on 21st sept 2017
On 21st September 2017
I am using a major telecom DVR that is on constantly 24/7. What is the typical power consumption of such a device? It feeds a 40" LCD television and I am curious as to the hit I take for these. The TV is on probably 12 hours a day.
On 15th September 2017
I tried using a 750watt power inverter to run my fridge when our power went out. Ran for about 10 seconds at 600watts and then would trip the protection in the inverter at over 800watts.
By curious on 13th September 2017
Hot water heater?
On 2nd September 2017
This is helpful, it confirms something I already figured out: this 400 watt desk fan is monstrous, and electronics circa 1950 weren't built for feint of heart.
On 10th August 2017
Hi Foster, without knowing the exact numbers, I would say a newer fan would be more efficient in terms of air blown per Watt used. However a newer fan may also just push more air and use more power overall. So if you prefer a low setting I would say to look in to a new mini desk fan as there is not much point in having a large fan running on a low setting all the time.
By Daft Logic on 8th August 2017
I am using an older model (80's Panasonic F-1609H 16" desk fan) usually on low setting...Would a newer fan be significantly more power friendly?
By Foster on 6th August 2017
It was so helpful for my physics project
By Geo Jolly on 31st July 2017
Many thanks. Quite Helpful.
On 29th July 2017
home theater wattage
On 11th July 2017
Please could u calculate the points of any apliance and add the amount payable.the page is very useful.
By Apology on 12th June 2017
Game Console has been added
By Daft Logic on 30th May 2017
Many thanks -- Good to have
By Yoga on 30th May 2017
This is good. Could you add gaming console to the list?
By Tk on 27th May 2017
The units of Watts are derived from metric base units, therefore a Watt is a metric unit.
By Daft Logic on 26th May 2017
I'm confused. Are these measurements imperial or metric?
On 26th May 2017
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