Iseli yelanga, eyaziwa ngokuba yi "solar chip" okanye "photovoltaic cell", ishidi le-optoelectronic semiconductor elisebenzisa ukukhanya kwelanga ukuvelisa umbane ngokuthe ngqo.Iiseli zelanga enye ayinakusetyenziswa ngokuthe ngqo njengomthombo wamandla.Njengomthombo wamandla, iiseli ezininzi zelanga enye kufuneka zidityaniswe kuthotho, ziqhagamshelwe ngokufana kwaye zipakishwe ngokuqinileyo kumacandelo.Iphaneli yelanga yinxalenye engundoqo yenkqubo yokuvelisa amandla elanga kwaye yeyona nxalenye ibalulekileyo yenkqubo yokuvelisa amandla elanga.