Therearethreereasonswhysolarenergyhasnotbeenmadeuseofwidely.Oneisitshighcost,ifpeoplewantstousethesolarenergy,itmustcosthimalottodoso.Itcostsmuchhigherthanthewaterenergyandmineralenergy.Secondreasonisabouttheweather,itisimpossiblethateverydayissunnydayontheearth.Soifthereisnotenoughsuninthesky,thesolarenergywillnotbeusedsomuch.Thelastreasonisaboutthetechinicalperson,becausetherearestillfewpersonwhoareveryprofessionalondevelopingsolarenergyused.Notonlyitneedalotofmoneytodevelopthistechinic,butalsothistechinicishighlycomplesity.However,thesolarenergyisstillagoodenergythatcanbeusedbypeopleinthefuture.