Solar panels produce direct current at a voltage that depends on module design and lighting conditions. Modern modules using 6-inch cells typically contain 60 cells and produce a nominal 24-30 V.SolarWorld's SW 245 is a typical modern module, using 6" cells in a 6 by 10 arrangement and a V_{oc} of 30.8 V (so inverters are ready for 24-50 V).
