Solar panel system 1.Free solar energy 2.Service life:25 years 3.Ersol solar panel system efficiency 18% 4.CE,GS certificate Product:Solar panel system Feature:1.Steady photovoltaic;2.High efficiency solar panel system:18%;3.Use mono or poly solar panel system;4.CE,GS Certificate;5.25 years lifetime,10 years warranty;6.Solar panel system include battery,controller and inverter. 5KW Solar panel ...