Typical Battery Draw of Common Appliances

Great chart from manualslib.com

TYPICAL BATTERY DRAW OF COMMON RV APPLIANCES

		Amp Hours Consumed Over Time
Appliance	Watts	5 min	10 min	30 min	1 hr	2 hr	4 hr
Single PL light	10	1 Ah	3 Ah	7 Ah	1.3 Ah	2.7 Ah	5.3 Ah
Computer	100	1 Ah	2 Ah	4 Ah	8 Ah	17 Ah	34 Ah
Color TV 13″	200	2 Ah	4 Ah	8 Ah	17 Ah	34 Ah	67 Ah
Blender	400	3 Ah	8 Ah	17 Ah	34 Ah	67 Ah	133 Ah
Circular Saw	800	6 Ah	17 Ah	34 Ah	67 Ah	133 Ah	266 Ah
Toaster	1000	8 Ah	23 Ah	46 Ah	93 Ah	185 Ah	370 Ah
Microwave	1200	10 Ah	28 Ah	57 Ah	114 Ah	227 Ah	455 Ah
Hot Plate	1800	15 Ah	44 Ah	88 Ah	176 Ah	353 Ah	706 Ah

If the current draw at 120 Vac is known, then the battery amperage at 12 Vdc 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.

Refrigerators and ice makers typically run about one-third of the time. Therefore,

their average battery current draw is one-third of what their amp rating would

indicate