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You are here: Topics › Sizing of Genset

Know your electricity consumption and help saving electricity

The table below tells you how much energy you consume through various devices. You can save a lot of energy for the nation and cut your electricity bills by switching off the devices which are not required.

Some Ready Calculations

Device (Capacity & Size)		Wattage	Monthly Electricity Consumption (kWh)		One Unit od power will be consumed when you run the device for...
			One hour/day	Six hours/day
Bulb		25	0.75	4.5	40 hrs.
		40	1.2	7.2	25 hrs.
		60	1.8	10.8	16 hrs. 40 min
		100	3	18	10 hrs
CFL	5 watt	7	0.21	1.26	143 hrs.
	9 watt	11	0.33	1.98	90 hrs
	11 watt	13	0.39	2.34	77 hrs.
	25 watt	27	0.81	4.86	37 hrs.
Fluorocent Tube Lights 48"	with Copper choke	55	1.65	9.9	18 hrs. 11 min.
Fluorocent Tube Lights 48"	with Electronic choke	35	1.05	6.3	28 hrs. 11 min.
Night Lamp		15	0.45	2.7	66 hrs. 40 min.
Ceiling fan	36/48"	50	1.5	9	20 hrs.
	56"	60	1.8	10.8	16 hrs. 40 min.
	60"	71	2.1	12.6	14 hrs. 17 min.
Table Fan 12" / 16"		40	1.2	7.2	25 hrs.
Electric Iron	Domestic	45./700	13.5 to 21	81 to 126	2 hrs. 13 min to 1 hr. 25 min.
Electric Iron	Dhobi	1000	30	180	1 hr.
Immersion Iron		1000	30	180	1 hr.
Geyser	Storage 15-50 lit	2000	60	360	30 min.
Geyser	Instant	3000	90	540	20 min.
AC	1 ton	1400	42	252	43 min.
AC	1.5 ton	1800	54	324	33 min.
Air Cooler		170	5.1	30.6	5 hrs. 53 min.
Refrigerator	Small	225			2 unit/day
Refrigerator	Big	300			4 unit/day
Toaster		800	24	114	1 hrs. 15 min.
Hot Plate		1000/1500	30 to 45	180 to 360	1 hr. to 40 min.
Elecric Kettle		1000/2000	30 to 60	180 to 360	1 hr. to 30 min.
Mixer-Juicer (Big)		450	13.5	81	2 hrs. 13 min.
Washing Machine	Automatic	325/1000			3 hrs. 5 min. to 5 hrs.
Washing Machine	Semi-Autometic	200	6	36	5 hrs.
Vacuum Cleaner		700-750	21 to 22.5	126 to 135	10 hrs. 26 min. to 1 hr. 20 min.
Radio		15	0.45	2.7	66 hrs . 40 min.
Tape Recorder		20	0.6	3.6	50 hrs.
TV		60 to 120	1.8 to 3.6	10.8 to 21.6	16 hrs. 40 min. to 8hr. 20 min.
Video		40	1.2	7.2	25 hrs.
Mosquito Repellant		5	0.15	0.9	200 hrs.
Water Purifier		25	0.75	4.5	40 hrs.
Computer		100 to 150	3 to 4.5	18 to 27	10 hrs to 6 hrs. 40 min.