1. The problem statement, all variables and given/known data My book states that solar cells are joined in series and in parallel to give a greater power because P=VI is increased by increasing V and I. 2. Relevant equations 3. The attempt at a solution I assume that the current in the solar cells depend on the intensity of sunlight. The holes and electrons in the p-n junction split apart when there is an incident photon. (I am not sure.) -If there are 4 solar cells and they are arranged in series. Assume the voltage created by the depletion region is 1V, the overall voltage will be 4V. If the sunlight produces 1 A current in each cells, the power will be 4V (4I) =16W -If there are 4 solar cells and they are arranged in parallel. The overall voltage will be 1V and the overall current will be 4A, the power will be 4W. -If the each of the 2 cells are arranged in a series and these two strands of series are arranged parallel, the overall current is 4A and the voltage will be 2V, therefore the power output is 8W. Why am I wrong? I can't figure out why a combination of series and parallel arrangement can lead to a higher power output.