Technical parameters:
1. Solar cell: mono-crystal silicon or polycrystalline silicon.
2. Service life of solar cell: 20 years.
3. Storage cell: high efficiency and servicing-free lead-acid cell.
4. Service life of storage cell: 3-5 years.
5. Lighting source: LED.
6. Control system: microcomputer intelligent control, preventing overcharge and overdischarge , having output short circuit protection and switching on or off the lamps subject to the dark and light.
7. Ambient temperature: -30 - 60.
8. Lighting time: 8-10 hours a day normally, or subject to customer setting basted on specific needs, capable of working for 3-5 consecutive days.

