Thoughtful energy management: A negative-control circuit optimizes energy flow by detecting system voltages for seamless connection of solar panels, batteries, and the controller's positive terminal. Enhanced functionality: Includes an initial timer function for evening lighting, multiple selectable load modes, and automatic correction of charging and discharging voltages to extend battery life. Reliable data monitoring: Records total runtime, fault timer, and complete charging events seamlessly, ensuring you never lose data. Easy installation and wiring: Designed for placement near the battery to minimize voltage drop from long cables; provides clear data indicators and supports practical parameter adjustments. Compatibility and performance: Suitable for standard solar charging systems, delivering reliable operation with efficient energy management and long-term reliability. Use scenarios: - Off-grid home or cabin: set an evening lighting timer, maintain battery health, and monitor charging events for peace of mind. - RV or boat solar setup: place controller near the battery to reduce wiring losses and simplify adjustments while keeping systems reliable. - Portable camping or remote installations: benefit from data logging, load mode options, and voltage regulation in a compact solar solution.