Page 179 - Applied Photovoltaics

Table 9.1. Typical load analysis of appliances in a RAPS home (Department of Primary Industries
and Energy, 1993).
typical power (W) average hours/day energy use—average
example example example
Appliance min max est. min max est. min max est.
(W) (W) (W) (h) (h) (h) (Wh/day) (Wh/day) (Wh/day)
Kitchen
Lights 11 100 1.00 3.00 11 300
Refrigerator 100 260 6.00 12.00 600 3,120
Microwave oven 650 1,200 0.17 0.25 111 300
Toaster 600 600 0.03 0.08 18 48
Other
Laundry
Lights 11 100 0.25 1.00 3 100
Iron 500 1,000 0.17 0.42 85 420
Washing machine 500 900 0.22 0.33 110 300
Dryer 1,800 2,400 0.20 0.54 360 1,300
Sewing machine 15 75 0.07 0.07 1 5
Water pumps 300 500 0.25 1.00 75 500
Other
Lounge room
Lights 15 100 1.00 4.00 15 400
Television 25 200 0.50 5.00 13 1,000
Video recorder 100 100 0.50 5.00 50 500
Stereo 60 80 0.50 3.00 30 240
Radio 10 40 0.33 3.00 3 120
Vacuum cleaner 100 1,000 0.13 0.25 13 250
Other
Bedroom 1
Lights 11 100 0.50 2.00 6 200
Other
Bedroom 2
Lights 11 100 0.50 2.00 6 200
Other
Bedroom 3
Lights 11 100 0.50 2.00 6 200
Other
Bathroom
Lights 11 100 0.17 1.00 2 100
Other
Garage/external
Lights 11 100 0.17 2.00 2 200
Power tools 200 800 0.17 0.17 34 136
Other
Total power 5,052 9,955 Total energy 1,554 9,939
Est. peak P (½ total) 2,526 4,978 Allowance for system losses (50%) 2 777 4,970
Assume 2,500 5,000 Total generated energy required 2,331 14,909 3

Notes
1 Average Wh/day = typical power (W) × average hours use per day (h/day).
2 Allowance of 50% should be added for estimated energy losses between point of generation and end use
in appliances.
3 kWh/day = Wh/day/1000

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