Yes, a solar panel can overcharge a battery. This device manages the voltage and current to the battery, ensuring safe. . A lithium-ion battery charging cabinet provides both fire-resistant storage and controlled charging conditions, reducing the risk of thermal runaway, overheating, and compliance violations. Made with a proprietary 9-layer ChargeGuard™ system that helps minimize potential losses from fire, smoke, and explosions caused by Lithium batteries. . I have 2 x 300ah 12V lipofe4 batteries connected in parallel charged by 48v PV system through a SmartSolar 150/85 charge controller with bulk set at 14. Understand Solar Charging: Familiarize yourself with how solar panels convert sunlight into electricity and the role of charge controllers in regulating voltage to prevent battery overcharging.