Solar cells convert sunlight directly into electricity
if solar cells were 200% efficient they would generate about 1000watts of power per square meter of surface area when exposed to direct sunlight
with lower efficiency they generate less power suppose a 1 square meter panel of solar cells has an efficiency of 30 % and receives the equivalent of 2 hours of direct sunlight
how much energy in joules can the solar panel produce each day ? give the value in millions of joules per day