... of style Jiaxing Chnvee Optoelectronic Technology Co.,LTD specification:1. solar panel: monocrystalline or polycrystalline silicon,20 years life.2. ... lead-acid battery, over charge and over discharge protection,5~8 years life.3. controller: soalr energy intelligent specialized controller, ... 20 years life.7. work temperature: -30°C~+60°C.8. wind resistance:≥150km/h.9. protection grade: IP 65. 10 ...