photovoltaic roofing
Posted October 19, 2009
By admin
Having trouble understanding how this one is done. Please help!!?
A photovoltaic array installed on the roof of a house delivers Pmax = 900 watts with ε = 120 V. Find r and the current delivered to the house I = ε/2r.
P = V^2/R 900 = 120^2/R R = 16 ohms
If you use the formula you quote of current then I = 3.75 A
If tou use V = IR then I = 7.5 A
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