In a sunny location, sunlight has a power density of about 1 kW/m^2. Photovoltaic solar cells can convert this?
In a sunny location, sunlight has a power density of about 1 kW/m^2. Photovoltaic solar cells can convert this power into electricity with 14% efficiency. If a typical home uses 380 kWh of electricity per month, how many square meters of solar cells would be required to meet its energy requirements? Assume that electricity can be generated from the sunlight for 8 hours per day.
Let's say you have 1 square meter of panels. Then you get 8 hours x 1 kW/m^2 x .14 = 1.12 kWh of energy per day.
If you have 2 square meters, you get 2.24 kWh's per day.
If you have N square meters, it's 1.12N kWh's per day.
Scale that up to a month (use 30 days for a month unless advised otherwise), and you should be able to solve for N.
Sanity check: the answer should be between 5 and 20 square meters.
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