The solar cell is the basic unit of a PV system. An individual solar cell produces direct current and power typically between 1 and 2 W, hardly enough to power most applications. For example, in case of crystalline silicon solar cells with a typical area of 10 × 10 cm2 an output power is typically around 1.5 Wp, with Voc ≈ 0.6 V and Isc ≈ 3.5 A.