G4E10 (B)
Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?
A. To prevent overload by regulating the charging voltage
B. To prevent discharge of the battery through the panel during times of low or no illumination
C. To limit the current flowing from the panel to a safe value
D. To prevent damage to the battery due to excessive voltage at high illumination levels
