Product: Solar Charge Controller CPT4840 Key benefits Keeps charging current within safe limits by automatically reducing charging power when solar panel output exceeds the controller capacity. This prevents overcharging and helps maintain stable system performance. Built in overvoltage protection at 150V protects connected equipment from input voltage conditions. Smart device enabled for system monitoring and control, simplifying integration with smart solar setups. What this controller does and why it matters Maintains rated charging current and improves energy conversion efficiency by throttling input when panel output drives current above rated levels. Protects batteries and downstream equipment from excessive voltage with a defined overvoltage protection point of 150V. Supports smart operation to aid in monitoring and remote adjustments where applicable. Specifications Model Number: CPT4840 Application: Solar System Controller Size: 30A Rated charging current: 60A Maximum Current: 40A Overvoltage protection point: 150V Color: 12V Is Smart Device: YES Features and performance Automatic charge limiting reduces charging power when panel output would otherwise push current above rated values, improving conversion rates and prolonging component life. Overvoltage protection at 150V provides a clear threshold for input protection. Smart functionality supports enhanced system management and monitoring. Compatibility and installation notes Designed for use in solar power systems as a charge controller component. Check system voltage and wiring to ensure compatibility with the listed specifications before installation. Practical use scenarios Off grid home battery systems where panel output varies throughout the day and automatic current regulation is needed to protect batteries. Mobile installations such as RV and marine systems where fluctuating sunlight can produce transient charging currents. Small commercial or agricultural solar setups that require overvoltage protection and smart monitoring to maintain reliable operation. This description presents the controller model CPT4840 with the specifications and functions as provided. Ensure system compatibility and installation follow local electrical codes and practices.