Question
A house with a south-facing roof has photovoltaic panels on the roof. The photovoltaic panels have an efficiency of $10.0 \%$ and occupy an area with dimensions $3.00 \mathrm{~m}$ by $8.00 \mathrm{~m}$. The average solar radiation incident on the panels is $300 . \mathrm{W} / \mathrm{m}^{2}$, averaged over all conditions for a year. How many kilowatt-hours of electricity will the solar panels generate in a 30 -day month?
Step 1
The area (A) is given by the product of the length and the width of the panels. In this case, the area is $3.00 \, \mathrm{m} \times 8.00 \, \mathrm{m} = 24.0 \, \mathrm{m}^2$. Show more…
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The solar panels on the roof of a house measure $4.0 \mathrm{m}$ by $6.0 \mathrm{m} .$ Assume they convert $12 \%$ of the incident EM wave's energy to electric energy. (a) What average power do the panels supply when the incident intensity is $1.0 \mathrm{kW} / \mathrm{m}^{2}$ and the panels are perpendicular to the incident light? (b) What average power do the panels supply when the incident intensity is $0.80 \mathrm{kW} / \mathrm{m}^{2}$ and the light is incident at an angle of $60.0^{\circ}$ from the normal? (W) tutorial: solar collector) (c) Take the average daytime power requirement of a house to be about 2 kW. How do your answers to (a) and (b) compare? What are the implications for the use of solar panels?
The solar panels on the roof of a house measure $4.0 \mathrm{m}$ by $6.0 \mathrm{m}$. Assume they convert $12 \%$ of the incident EM wave's energy to electric energy. (a) What average power do the panels supply when the incident intensity is $1.0 \mathrm{kW} / \mathrm{m}^{2}$ and the panels are perpendicular to the incident light? (b) What average power do the panels supply when the incident intensity is $0.80 \mathrm{kW} / \mathrm{m}^{2}$ and the light is incident at an angle of $60.0^{\circ}$ from the normal? (c) Take the average daytime power requirement of a house to be about $2 \mathrm{kW}$. How do your answers to (a) and (b) compare? What are the implications for the use of solar panels?
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