100A MPPT solar controller with automatic system voltage detection (12/24/36/48V) and up to 99.5% tracking efficiency to maximize solar harvest. Backlit LCD provides clear visibility and real-time monitoring; seven operating modes including charging, light control, manual control, and more for flexible solar management. Robust protections to safeguard your system: surge and overcurrent protection, overcharge prevention, deep discharge protection, secure terminal connections, and built-in overtemperature protection. User-friendly features: advanced maximum power point tracking, 24V/48V identification, USB 5V output for charging devices, and a concise dashboard showing mode, battery voltage, PV current, and temperature. Durable, compact enclosure built for outdoor use; reliable performance across conditions and compatible with 12/24/36/48V systems for various installations such as off-grid cabins, RVs, and boats. Use scenarios: off-grid cabin or workshop; RV or camper van; marine vessel for reliable backup power or remote operation.