Many larger Grady-Whites including the 300, 330, 336, 375 and 376 have two electrical power systems: Direct current (12V DC battery power) and alternating current (120V AC shore power or generator systems). Safely and efficiently using these systems is simple, yet requires some basic understanding of how they work and how to use them properly. This article covers simple basics of the electrical systems panel box and electrical loads. Later articles will cover the DC (direct current) and other systems in more detail. Take a look at Eric Sorenson in the below video as he shows how to use the panel box aboard the Express 330; other boat models with like systems operate similarly. Also note that while this video communicates the basics, there's no substitute for reading and understanding the details in your Owner’s Manual.
AC (alternating current system)