Trace Engineering DR Series Owner’s Manual - Version 3.2 - 9/7/98 - Page 45
Table 9, Typical Battery Draw of Common Appliances (For 24 Volt Inverters)
TIME IN MINUTES
APPLIANCE WATTS 5 15 30 60 120 240
Single PL Light 10 .06 .2 .3 .7 1.3 2.7
B & W TV 50 .2 .6 1 2 4 8
Computer 100 .4 1 2 4 8 17
Color TV 200 1 2 4 8 17 34
Blender 400 2 4 8 17 34 67
Skil Saw 800 3 8 17 34 67 133
Toaster 1000 4 11 23 46 93 185
Microwave 1200 5 14 28 57 114 227
Hot Plate 1800 8 22 44 88 177 353
AMP HOURS
If the current draw at 120 VAC is known, then the battery amperage at 24VDC will be 5 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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