This XH-M604 / HW-633 Battery Charging Control Module is an intelligent programmable switch engineered to manage charging systems for batteries rated from 6V to 60V [Image 1.2.5, Image 1.3.1]. Equipped with a bright, 3-digit LED display and a heavy-duty 30A power relay, it allows you to set precise starting and stopping voltage thresholds via a simple two-button interface [Image 1.3.1, Image 1.4.3]. The module automatically activates charging when the battery drops below your low limit and safely cuts off the circuit when the battery reaches full capacity, making it perfect for solar, lead-acid, and high-capacity lithium battery arrays