This controller combines four focused functions to simplify and improve solar‑powered lighting and battery systems: What it does and why you need it Charges lithium batteries safely and efficiently to protect battery life and ensure reliable power. Provides professional solar charging to maximize energy harvest from panels and reduce dependence on grid power. Offers visual adjustment of the tracking-point voltage (maximum power point tracking) so you can tune the system for best solar performance under changing conditions. Acts as an LED constant-current driver to deliver stable light output, protect LEDs from overcurrent, and reduce flicker. Key benefits Better battery health: Lithium charging logic reduces overcharge and undercharge, extending battery lifespan. Higher solar efficiency: The tracking-point visual adjustment helps capture more available energy from solar panels without complex tools. Consistent lighting performance: The constant-current LED driver maintains steady brightness and protects LED fixtures. Easier setup and tuning: Visual MPPT adjustment makes it simpler to optimize system performance on site. Compatibility and function Designed for systems using lithium batteries, solar panels, and LED lighting loads. Integrates charging management, solar harvesting control, MPPT visual tuning, and LED current regulation in one device. Suitable for new installations or upgrades where lithium battery charging and controlled LED driving are required. Practical attributes Compact form factor for straightforward installation in a variety of enclosures or mounting locations. Controls and indicators provide visual feedback for tracking-point voltage adjustments and operating status. Built to handle typical solar lighting system loads and LED drivers; intended for professional solar charging applications and LED lighting control. Typical use scenarios Solar street or pathway lighting: charge lithium batteries from solar panels, tune tracking-point voltage for variable sunlight, and drive LED luminaires with stable current. Off-grid or remote lighting systems: ensure reliable battery charging and consistent LED output where mains power is unavailable. Emergency or backup lighting and signage: maintain battery readiness, harvest solar input efficiently, and protect LED modules from current fluctuations. Functions at a glance Lithium battery charging Professional solar charging Visual adjustment of tracking-point voltage (MPPT tuning) LED constant-current driver This device is intended for installations requiring integrated lithium charging, optimized solar collection, MPPT visual tuning, and reliable LED current control.