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APPLIANCE
Single PL Light
B & W TV
Computer
Color TV
Blender
Skil Saw
Toaster
Microwave
Hot Plate
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 five times running current. Keep this in mind when sizing a motor into a system.
Refrigerators and icemakers typically run about 1/3 of the time. Therefore, their average battery
current draw is 1/3 what their amp rating would indicate.
WK
WATTS
5
10
.1
50
.4
100
1
200
2
400
3
800
6
1000
8
1200
10
1800
15
TIME IN MINUTES
15
30
60
120
.3
.7
1.3
2.7
1
2
4
2
4
8
17
4
8
17
34
8
17
34
67
17
34
67
133
23
46
93
185
28
57
114
227
44
88
176
353
AMP-HOURS
240
5.3
8
17
34
67
133
266
370
455
706
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