I have a small solar panel of the following,
- Area = 0.0078 square meter
- Rated Power = 1 W
Now, I am interested to calculated the total energy this solar panel can harvest over a day.
I am taking the following parameters,
- Annual solar irradiance = 1200 KWh/square meter
Converting this for my solar panel, I get (1200 KWh/365)*0.0078 = 25.6 Wh
Is this 25.6 Wh the total energy it can provide? But I think is is not right as solar panel is only rated to 1 watts, how can it provide so much? Is this right or I am missing something else in my calculation?
I also tried the other way to calculated the total energy it can harvest in a day. This is what I did next.
I find the average sun shine hour from here, I did the average calculation and got 2.74 hr
Energy = 1 watt * 2.74 = 2.75 Wh, this is the right way to do it?
I didn't use the sun irradiance in my second calculation, is this correct?
Which one of the method is correct to calculate the energy for my solar panel? or there is some other method?