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Electricity usage (and costs) of common household appliances

LabAnimal

Expert Member
Joined
Aug 27, 2005
Messages
4,129
#2
My computer's stay on 24hours. Ofcourse the monitors goes into standby when not in use, but the towers stay on, the routers stay on. Wonder what that costs...
 

gregmcc

Honorary Master
Joined
Jun 29, 2006
Messages
21,227
#5
Here's some more info:


Household Electrical Consumption

Kitchen Electrical Hours Days kWh Monthly
rating in watts per per (Units) used cost
(1000W=1kW) day month per month (40.1c/kWh)
Dishwasher: Heater and motor 2,700 2.0 25 135 R 54.13
Electric stove front large plate 2,000 2.0 30 120 R 48.12
Electric stove front small plate 1,500 1.0 15 22.5 R 9.02
Electric stove back large plate 1,500 1.5 30 67.5 R 27.06
Electric stove back small plate 1,000 1.0 25 25 R 10.02
Electric oven grill element 2,200 0.5 15 16.5 R 6.62
Electric oven bake element 1,900 0.5 20 19 R 7.62
Electric two plate stove (Hotplate) 2,000 3.5 30 210 R 84.21
Freezer (chest) 230 6.5 30 44.9 R 18.00
Freezer (upright) 330 6.5 30 64.4 R 25.82
Geyser 2,000 5.0 30 300 R 120.30
Kettle 2,400 0.5 30 32.4 R 12.99
Microwave oven (Medium) 1,300 1.5 30 58.5 R 23.46
Refrigerator with freezer 550 6.5 30 107.3 R 43.03
Slow cooker 250 8.0 20 40 R 16.04
Computer 120 3.0 30 10.8 R 4.33


Lounge Electrical Hours Days kWh Monthly
rating in watts per per (Units) used cost
(1000W=1kW) day month per month (40.1c/kWh)
Air conditioner 2,500 12.0 20 600 R 240.60
Compact disk player (CD) 10 3.0 10 0.3 R 0.12
Heater (2 bars) 1,300 5.0 20 130 R 52.13
Heater (3 bars) 2,000 5.0 20 200 R 80.20
Heater capil 1,500 5.0 20 150 R 60.15
Heater fan 2,000 5.0 20 200 R 80.20
Heater oil 2,000 5.0 20 200 R 80.20
Hi-fi with 30 watt speakers 180 3.0 10 5.4 R 2.16
Lighting: single bulb (60w) 60 5.0 30 9 R 3.61
Lighting: single bulb (100w) 100 5.0 30 15 R 6.01
Lighting: ceiling fixture 3 x 60w bulb 180 5.0 30 27 R 10.83
Lighting: fluorescent 2 tube (1 metre) 100 5.0 30 15 R 6.01
Lighting: energy saving lamp (cfl) 20 5.0 30 3 R 1.20
Lighting: energy saving lamp (cfl) 11 5.0 30 1.7 R 0.68
M-net decoder 28 12.0 30 10.1 R 4.05
Radio: portable with cassette player (2 speaker) 18 4.0 30 2.2 R 0.88
Radio: portable without cassette player 6 4.0 30 0.7 R 0.28
Tape deck (double) 20 4.0 30 2.4 R 0.96
Television 37 cm colour 50 6.0 30 9 R 3.61
Television 51 cm colour 80 6.0 30 14.4 R 5.77
Television 70 cm colour 100 6.0 30 18 R 7.22
Video recorder 35 3.0 20 2.1 R 0.84
DVD player 14 3.0 20 0.84 R 0.34
 

Eniigma

Expert Member
Joined
Aug 18, 2006
Messages
1,018
#13
My flatmate and I both had aircons installed in our bedrooms last year feb... they pretty much run 6-12 hours per day and fulltime on weekends, unless we go out for more then 1hour. I think our electric bill went up around about R200 per month if that. Won't quote me on that though as I don't really pay that much attention to the electric bill. Appart from the aircon usage there is not much we could do to reduce ours as we don't use a tv etc. Although we are thinking of getting a monochoice subscription before the super 14.
 

Paulr

Senior Member
Joined
Apr 24, 2006
Messages
987
#15
Ok, this might be slightly off topic, but anyway.....

Do any of you have experience with this thingie from Verimark?

Reason I'm asking is with 5 people in the house, plenty of rainy days and our ancient tumbledryer on it's way out, we are looking for a solution that will use less power as well (a tumbledryer uses a LOT of power)....
 

DragonLogos

Expert Member
Joined
May 2, 2005
Messages
2,030
#18
Changing to LCDs helps a lot - especially in a office situation - there is also a transformer solution that you can make out of an old PSU that I will post this week
 

StrongTurd

Expert Member
Joined
Feb 23, 2005
Messages
1,490
#19
Should be just under R100 a month if you are running that 750W psu.
The size of a PC's power supply has got nothing to do with its actual power consumption. That number gets determined by the power draw of the components connected to the PSU (CPU, chipset, RAM, GPU etc). I would venture to say that there are VERY few PCs out there that can actually draw 750 Watt from the wall.

However, suppose you were to accept the (flawed) number of 750 Watt then I calculate the monthly consumption as follows:

.75kW * 24 hours = 18 kW/h per day. 18kW/h * 30 days = 540 kW/h per month.

Assuming that you pay arount R0.47 per kW/h, then this should translate into around R253 per month. However, as I mentioned earlier, your PC will in reality only draw a fraction of 750 Watt.
 
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