solar system: 1.Stabilization and dependability 2.energy-saving and economical 3.quiet and environmental protection Jiaxing ... , forest fire stations, Border-guard Stations, etc. 2. Advantage: 1).Stabilization and dependability 2).energy-saving and economical 3).quiet and environmental ... life span, 3 years warranty; case : 10 years life span, 2 years warranty