
Solar PV
NOCT vs STC: Why a 580W Panel Really Makes ~440W
Every module carries two power ratings, and only one of them describes a roof. The larger number on the label comes from a laboratory flash test; the smaller one comes from a condition much closer to an operating array. Designers who plan around the label alone overestimate yield and, more importantly, sometimes misjudge the currents and voltages the collection equipment has to handle. NEUTRON supplies the combiner boxes, direct-current protection and busbar components that sit behind the array, so this article explains both ratings and then follows the numbers through to enclosure and fuse selection.











