Whether you’re setting up a weekend cruiser or optimizing a vessel for long-range voyages, a reliable 12-volt setup is the absolute heart of your boat’s safety and comfort. This hands-on intensive dives deep into the fundamentals of marine battery chemistry, comparing flooded lead-acid, AGM, and Lithium helping you choose and care for the right bank for your needs. We’ll take the mystery out of solar integration, covering how to pair panels with MPPT charge controllers, size your array, and position wiring to capture every photon of available sunlight. You’ll learn how to design a streamlined system that maximizes efficiency and avoids the "spaghetti wiring" that causes so many electrical headaches onboard. Through practical demonstrations, we’ll walk through proper crimping, over-current protection, battery monitoring, and switching to ensure your setup is both robust and safe. By the end of the class, you’ll have a clear, customized schematic in mind and the practical skills to build, upgrade, or troubleshoot your onboard solar and battery bank with total confidence.