Comments on Energy: How Much Electricity Does a 32" Sharp LCD TV Use?

Just to make things simpler: Let's say your T...

2009-10-01T15:46:23.616Z

Just to make things simpler:

Let's say your TV uses 125 watts, that's .125 Kwh, so if you pay 11 cents per Kwh, it's (0.125 * 11 cents) 1.375 cent an hour. So using this device will cost you 1.375 every hour. Now, if you watch TV 2 hours a day, for a month of 31 days, it will cost you (31 days * 2 * 1.375) 0.85$ for the whole month.

Electricity is still relatively cheap, and although we should all moraly try to consume less, it doesn't make much of a difference on your electricity bill. Heating and air conditioning, which uses huge amount of energy, *does* make a difference, so using electronic thermostats and insulating your windows can make a good difference on your bill.

Sorry, it's way too early in the a.m. --- 45,000 w...

2009-04-04T14:53:00.000Z

Sorry, it's way too early in the a.m. --- 45,000 watt-hours divided by 1,000 equals 45 kilo-watt hours (not 450 KWHr) which times 11 cents/KWHr = $4.54, and again that's for the32", 125 watt TV being on 12 hours per day for a month (30 days).

Correction - I messed up the math a little bit in ...

2009-04-04T14:46:00.000Z

Correction - I messed up the math a little bit in the previous post. A kilo-watt is 1,000 watts, so if your 125 watt TV is run for 8 hours, then it uses 1.0 kilo-watt hours of energy. That's 1,000 watts for one hour, or 125 watts for 8 hours.

And then 1 KWhr times 11 cents/KWhr equals 11 cents. (Not $1.10) So if you run your TV 12 hours per day at 125w, that's (12 * 125 * 30) = 45,000 watt-hours which equals 450 KWHr times 11 cents per KWHr = 4,950 cents = $50.00 per month.

Another example is Electric Heaters. They usually take 1,500 watts, if you run it for 24 hours, that 36,000 watt-hours which equals 36 kilo-watt hours. At 11 cents per KWhr, that's $3.97 (per day) or $120 per month to heat one room! Have 4 in your house and that's $480/month.

Watts are Volts times Amps. Once you know the wat...

2009-04-04T14:37:00.000Z

Watts are Volts times Amps. Once you know the watts, you can predict the impact on your energy bill, like this: if you run the TV for 1 hour and it uses 125 watts, that means you burned 123 kilo-watt hours (125 kwh).

Now look on your energy bill, and it will say how much a kwh costs. usually it's between $0.10 and $0.12 (10 cents to 12 cents) that I've seen anyway. Let's say it is 11 cents per kilo-watt hour. So if you watch tv for 8 hours and it uses 125 watts, then the dollar cost to you is 125kwh * 8h * 11 cents/kwh = $1.10

Watts = Joules per Second

2008-10-27T03:12:00.000Z

Watts = Joules per Second

Hi, is the watts per hour?

2008-08-23T11:04:00.000Z

Hi, is the watts per hour?