... Wafer)conversion efficiencyClass A,Conversion Rate Above15%Storage battery60 AH solar dedicated Maintainance-free gel storage batterySolar controllerXCHG seriesmi crocomputer ... warrantyLight sourceWarranty 2 years ,1000 hours no light decay,3000 hours below 3%solar panelWarranty 5 years, convertion rate drop not ... .Maintain2 h for response, solve product problems in 3days. solar power street light