G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

1. ATo prevent overload by regulating the charging voltage
2. BTo prevent discharge of the battery through the panel during times of low or no illumination
3. CTo limit the current flowing from the panel to a safe value
4. DTo prevent damage to the battery due to excessive voltage at high illumination levels

Pick an answer to check it.