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