Theÿwind/solarÿhybridÿcontrollerÿisÿcontrolÿdeviceÿwhichÿcanÿcontrolÿwindÿturbineÿandÿsolarÿpanelÿatÿtheÿsameÿtimeÿandÿtransformÿwindÿandÿsolarÿenergyÿintoÿelectricityÿthenÿstoreÿtoÿtheÿbatteryÿbank.ÿWind/solarÿhybridÿcontrollerÿisÿtheÿmostÿimportantÿpartÿinÿoffgridÿsystem,ÿwhoseÿperformanceÿhasÿmuchÿeffectÿonÿlifeÿexpectancyÿandÿoperationalÿstabilityÿofÿtheÿwholeÿsystem,ÿespeciallyÿtheÿbatteryÿexpectancy.ÿOrÿbatteryÿserviceÿlifeÿwillÿbeÿshortenedÿbyÿover-chargeÿorÿover-discharge.