Introduction - If you have any usage issues, please Google them yourself
The current situation of photovoltaic systems (PV systems) is introduced at first,
and then basic concepts, theories, and components of PV systems are discussed in this
paper. Key technology of PV system is checked, especially methods of battery
monitoring are explored. Three monitoring methods of charging state are presented:
the method based on battery on-line voltage monitoring, the method based on battery
off line voltage monitoring and the method based on formulas. The functions which
PV system controllers need to have are discussed in theory too, such as controlling of