A solar panel has an efficiency of 15%. How much solar power is necessary to produce 300 watts of useful power?
A 45
B 20
C 285
D 255
To calculate the solar power necessary to produce 300 watts of useful power, we need to divide the desired power output by the efficiency of the solar panel.
300 watts / 0.15 = 2000 watts
Therefore, the solar power necessary to produce 300 watts of useful power is 2000 watts.
None of the given answer choices (45, 20, 285, 255) are the correct answer.