Trace Engineering DR Series Owner’s Manual - Version 3.2 - 9/7/98 - Page 44
Typical Battery Draw of Common
Appliances
Table 8, Typical Battery Draw of Common Appliances (For 12 Volt Inverters)
TIME IN MINUTES
APPLIANCE WATTS 5 15 30 60 120 240
Single PL Light 10 .1 .3 .7 1.3 2.7 5.3
B & W TV 50 .4 1 2 4 8 17
Computer 100 1 2 4 8 17 34
Color TV 200 2 4 8 17 34 67
Blender 400 3 8 17 34 67 133
Skil Saw 800 6 17 34 67 133 266
Toaster 1000 8 23 46 93 185 370
Microwave 1200 10 28 57 114 227 455
Hot Plate 1800 15 44 88 176 353 706
AMP HOURS
If the current draw at 120 VAC is known, then the battery amperage at 12VDC will be 10 times the AC
amperage divided by the efficiency (90% in this table).
Motors are normally marked with their running rather than their starting current. Starting current can be
2-6 times running current.
Refrigerators and ice makers typically run about 1/3 of the time. Therefore, their average battery
current draw is 1/3 what their amp rating would indicate.
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