Solar Panels Question?
Im trying to work out the area of solar panels at 40% efficiency that would be needed to power the whole of the UK, i have found the consumption of the UK is on average 6500000000w but i don't know how to work out the input into the Solar panel in order to work out the output.
well logie ogie just in case you were wondering im not really planning on doing it... -.- and im not sure my science teacher would be too impressed if i wrote that in my essay...
You need the average Insolation in the UK ('INcoming SOLar radiATION'). This website has figures[1].
Take the London figure, roughly 2.6kWh/m^2/day. At 40% efficient solar panels, a metre squared will get 1.04kWh per day.
6.5GW average (GW means GigaWatts, which is a billion watts...) is a daily power use of:
6.5 x 24 = about 156GWh (GigaWatt hours)
Divide total demand by amount per metre-squared to get the area needed.
156000000/1.04 = 152.9 million square metres.
To get an idea, that's just over 0.06% of the UK's land area, or 7.6 square metres per UK household. We could probably theoretically fit all of that on roofs and the side of buildings.
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