Solar powered attic ventilation runs off solar power exclusively. Outside air is then forced through the attic and out of the vent to cool your attic space. This means attic ventilation is a lot more effective than natural ventilation, due to air being exchanged at a greater rate per hour with a solar powered vent than with cooling methods like ridge vents, turbine vents, dormer vents and gable vents.
Solar powered attic ventilation is also much more environmentally friendly as no fossil fuels are burned in the powering of the fan.