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AIDG Blog [Appropriate Technology, Development, Environment]

What can you do with 400 watts? 

by Catherine Laine
January 7th, 2007

I’m having a Slate Explainer moment.

The 16KW micro hydroelectric project recently completed by Xela Teco is providing electricity for 40 families living at the Comunidad Nueva Alianza in Guatemala. This is the first time that members of the community have had electricity in their homes. 16KW translates to 400 watts per household. But what can you do with 400 watts?

I don’t know what each household will do precisely, but here is a sample breakdown.

4 compact fluorescent lightbulbs 60 Watts (15W each)
Stereo 80 Watts
Television (19″ Color) 110 Watts
Cell phone charger 45 Watts (I think)
Total 295 Watts
(assuming they are all on at the same time)

Not too shabby, not too shabby at all. But let’s put this in perspective with how much energy Joe Schmoe regular in the U.S. might use. Here is info from the Department of Energy on the typical wattage of home appliances when in use. The data may surprise you. Appliances that heat or cool are the biggest energy vampires.

Coffee Maker 900-1200 Watts
Clothes Washer 350-500 Watts
Clothes Dryer 1800-5000 Watts
Clothes iron 1000–1800 Watts
Hair dryer 1200–1875 Watts
Laptop 50 Watts
Microwave Oven 750–1100 Watts
Refrigerator
(frost-free, 16 cubic feet)
725 Watts
Toaster 800–1400 Watts
Toaster oven 1225 Watts
VCR/DVD player 17–21 / 20–25 Watts
Vacuum cleaner 1000–1440 Watts

Bar chart showing the appliance use of common home appliances in cost per year and kWh per year: electric blanket: <$42, <500kWh, home computer: <$42, <500kWh, TV: <$42, <500kWh, microwave oven: <$42, <500kWh, dehumidifier: <$42, <500kWh, well pump: <$42, <500kWh, aquarium/terrarium: $42-$83, 500-1000kWh, dishwasher: $42-$83, 500-1000kWh, electric cooking: $42-$83, 500-1000kWh, freezer: $42-$83, 500-1000kWh, waterbed heater: $42-$83, 500-1000kWh, clothes dryer: $42-$83, 500-1000kWh, washing machine: $42-$83, 500-1000kWh, refrigerator: $83-$125, 1000-1500kWh, pool pump: $83-$125, 1000-1500kWh, spa (pump and heater): $166-$208, 2000-2500kWh.

How Much Electricity Do Appliances Use?
“This chart [from the U.S. Department of Energy] shows how much energy a typical appliance uses per year and its corresponding cost based on national averages. For example, a refrigerator uses almost five times the electricity the average television uses.” Note: A typical U.S. household consumes about 11,000 kWh per year, costing an average of $900 annually.

Not to be a preachy goody goody, but I do want to mention this. Many of you will have grown up in a household where a parent said “Clean your plate, because there are people out there who don’t have food to eat”. Let’s talk that lesson a step further and say ” Turn off the lights when you are not using them, unplug your cell phone and laptop chargers, switch to compact fluorescent or LED lighting, etc. because there are folks out there without electricity or who have to watch every watt”.

Other useful resources:
How much electricity does my stuff use?
Generator Sales
What is a kilowatt hour anyway?

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