This solar charge controller delivers safe, efficient battery management and broad system compatibility for off grid power setups. Its four stage charging logic and intelligent controls reduce battery stress and heat while keeping systems reliable and easy to monitor. Key benefits Safer, faster charging with four stage charge control: batch, boost, float, and equalizing charging to reduce gas buildup and overheating risk. Plug and play compatibility with 12V, 24V, 36V, and 48V DC systems and multiple battery chemistries for flexible installation. Built in dual USB ports plus timer setting and PWM automatic parameter adjustment for versatile load control and device charging. Robust protection suite to diagnose and protect against common faults, minimizing downtime and maintenance. Durable construction and clear LCD feedback for long service life and simple system monitoring. Main features Four stage charging: batch, boost, float, and equalizing charging modes support proper battery maintenance and extend battery life. Automatic voltage detection: supports 12V, 24V, 36V, and 48V DC systems without manual switching. Dual USB ports: provide direct charging of devices; timer setting and PWM auto parameter function allow scheduled and optimized load control. Comprehensive diagnostics and protection against PV array short circuit, PV overcurrent, load overload, load short circuit, PV reverse connection, battery reverse connection, and overheating. Rugged materials: constructed from ABS and aluminum alloy for wear resistance, durability, and long service life. Informative LCD: dynamic readout of controller parameters including working mode, battery voltage, PV charging current, battery discharging current, product working temperature, and delay time for straightforward system management. Typical applications Off grid homes and cabins: manage solar panels and battery banks to maintain reliable power for lighting, appliances, and charging. Recreational vehicles and boats: control charging and loads for 12V to 48V electrical systems while providing convenient USB charging for electronics. Remote equipment and lighting: protect and optimize batteries for telecom cabinets, remote sensors, or outdoor lighting with programmable load timing. This controller combines multi stage charging, wide voltage compatibility, built in USB and timer functions, and extensive protection in a durable package with a clear LCD for easy monitoring and dependable operation.