The most important components of solar lighting system are intelligent controller, solar panel and storage battery. Service lift of storage battery is the key.
Currently, storage battery has such kinds: sealing lead-acid battery, colloid storage battery, Lithium iron batteries and alkaline battery. Voltage is normally 12V or 24V. Popular used are sealing lead-acid battery and colloid storage battery, due to their free-maintenance and environment friendly.
Battery used for solar street lighting system should be more times for circulation of charge-discharge, low self discharging
rate, long service life, high efficiency of charging and less or free maintenance.