Photovoltaic (solar electric, PV) systems create electricity from the sun's energy. PV systems are a sensible way to create energy in areas that would otherwise go without. Many farms already utilize PV for applications like electric fences and gates. PV is not limited in scale. Any application that requires energy can be solar powered. PV modules (panels) produce direct current (DC) electricity, inverters can transform this energy to alternating current (AC) or DC appliances can be employed. PV modules can be purchased to meet almost any voltage, amperage, or wattage specification. Batteries can also be employed to provide energy during periods without sun.