It is almost a year and a half since I 've been using 10 solars led lamp to
lights up the outdoor area of my house. Each lamp is rated
with 5W if it is fully charged by solar energy.
The lamp is using LDR in which it lighted up automatically
when it is dark.
Usually it starts from 730pm and the battery will last up to
6.30am.
So total hours for a day will be 11 hr.
Now lets calculate how much energy in kilowatt-hour is
consumed a day for each lamp:
Total energy consumed a day by one solar LED lamp:
Energy,E = P x t
E = 0.005kW x 11hr
E = 0.055
kW hr
Since I am using 10 lamp..so total
energy per day will be,
E = 10 x (0.055)
E = 0.55 kWhr.
Imagine for a year in average will be 365
days..
So total energy used per year will be….
E =(365 days) x 0.55
E = 200.75 kWhr.
Usually TNB's average rate for 1kWhr =RM0.218
So for a year, On average these 10 lamps
should cost me…
RM0.218 x 200.75 = RM43.76
The best part is I don’t have to pay
anything to TNB as I am using a free source of energy which is the solar energy from
the sun.
Can u imagine if all our electrical
appliances are powered by solar energy? How much money will be saved a year? The most important part is it is environmentally friendly.
Let's fully utilize solar energy.
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