one more reason to conserve electricity
If you like having a lot of electric appliances running around the house, plus lights and fans and AC’s (or heaters as the case may be), a look at the following graph might make you reconsider just how many things you leave on.
Based on rates as of 24/2/2007, the graph shows how the cost of electricity rises per 100 kWh of usage. (For more information on just how much electricity is 100 kWh, click here). As you can see, the largest gain is when you go upwards of using 300 kWh, where costs increase by almost 40% per kWh, compared to the 27% or 13% from 100 kWh or 1000 kWh upwards respectively.
These costs do not include meter rent (~Rs.20), sales tax (15%) or applicable income tax deductions.
So the next time your electrical bill soars, think about where your electricity is going in the first place. The more electricity you use, the exponentially your costs go up.
Some kWh calculations for common household items (running for 10 hours a day) are
- One 1.5 Ton AC = 2 kWh or 600 kWh / month
- One 100 watt lightbulb = 0.1 kWh or 10 kWh / month
- One 25 watt tubelight = 0.025 kWh or 7.5 kWh / month
To find out how much electricity each appliance is using, look for ‘watt’ reading on its label. This is the number of watts consumed in an hour. If watt is not given, multiply the Ampere and Voltage readings (e.g. a 1.5 ton AC works on 9.1 Ampere on 220 Volts, making it 2002 watts). To find out how much kWh it will use in a month, running at 10 hours per day, multiply this rating by 0.3.