At present, though, photovoltaic cells are relatively inefficient, and the electricity produced from the cells is expensive when compared with that produced from fossil fuels.
Kahjuks on fotogalvaanilised elemendid praegu veel võrdlemisi väheefektiivsed, nii et patareide abil toodetav elekter on võrreldes fossiilsete kütuste baasil saadava elektriga kallis.