Hnub ci dej twj tso kua mis (tseem hu ua photovoltaic dej twj tso kua mis), yog txoj kev txaus nyiam tshaj plaws ntawm cov dej hauv lub hnub nplua nuj ntawm lub ntiaj teb, tshwj xeeb tshaj yog nyob rau hauv tej thaj chaw deb tsis muaj hluav taws xob thiab tsis muaj hluav taws xob, siv cov khoom siv hluav taws xob muaj thiab tsis muaj hnub ci nyob txhua qhov chaw, qhov system yog tag nrho tsis siv neeg hnub tuaj, hnub poob thiab so, tsis muaj kev saib xyuas cov neeg ua haujlwm, kev saib xyuas kev ua haujlwm yuav raug txo kom tsawg, yog ib qho zoo tshaj plaws ntawm kev lag luam, kev ntseeg siab thiab kev tiv thaiv ib puag ncig raws li ib qho ntawm lub zog ntsuab.