Solar MPPT Charge Controller for Off Grid Photovoltaic Systems Description This MPPT solar charge controller maximizes energy harvest from solar panels while coordinating solar, battery, and load operation in off grid photovoltaic systems. It combines real time MPPT tracking, robust protection features, an LCD interface for parameter control, and multi battery compatibility for stable, adaptable charging. Key benefits Maximize charging efficiency: Real time MPPT tracking follows the panel voltage and current to deliver maximum power to the battery, increasing available energy for the system. MPPT tracking efficiency greater than 99 percent. Adaptable and compatible: Automatic 12 V 24 V system detection and support for multiple battery types including gel, sealed, open cell, and lithium batteries. Battery voltage range 9 to 32 V. Clear monitoring and control: LCD displays operating status, parameters, and control settings. Front panel buttons let you view and modify settings to match system requirements. Includes dual USB output 5 V 3 A for charging small devices or powering accessories. Protection and reliability: Input power limiting protection, photovoltaic input voltage protection, and automatic current limiting charging mode reduce risk from installation errors and system faults. When charging current exceeds rated value, the controller reduces charging power to maintain rated current. Low idle loss and conversion: No load loss less than or equal to 0.4 W and conversion efficiency up to 98 percent help minimize energy waste. Features and performance MPPT charging: Detects solar panel power in real time and tracks maximum power point over a voltage range from battery voltage plus 2 V up to 100 V. System voltage: 12 V 24 V adaptive. Solar energy maximum input voltage: 100 V VOC. Battery voltage operating range: 9 V to 32 V. USB output: 5 V 3 A (dual port). Conversion efficiency: less than or equal to 98 percent. MPPT tracking efficiency: greater than 99 percent. No load loss: less than or equal to 0.4 W. Temperature compensation coefficient: 2 mV per C per 2 V (default). Operating temperature: 10 C to +65 C. Protection rating: IP21. Electromagnetic compatibility: designed for stable electromagnetic behavior in typical installations. Current limiting charging mode: prevents overcurrent by automatically reducing charging power when . Safety and installation notes Input power limiting and voltage protection reduce the chance of component damage from improper wiring or unexpected PV voltage. Designed for simple, clear configuration via the LCD and buttons to adapt charging profiles and protection setpoints to your system. IP21 protection suitable for indoor or protected installations; avoid direct exposure to weather without additional enclosure. Applications and use scenarios Residential off grid backup: Charge batteries efficiently in a cabin or small home solar system, manage loads, and power USB devices for household electronics. Remote monitoring and communications: Provide stable battery charging and protection for communication base stations or remote telemetry and monitoring equipment. Outdoor lighting and road monitoring: Support landscape lighting, highway intelligent monitoring systems, or roadside equipment with reliable charging and current limiting to extend component life. What it solves Increases usable solar energy through efficiency MPPT tracking. Simplifies system setup with adaptive voltage detection and configurable charging profiles for different battery chemistries. Reduces risk of damage from wiring mistakes, overvoltage, or excessive charging current with builtin protections. Provides clear status and easy adjustments via the LCD display and buttons. Specifications summary Item type: Solar charge controller System voltage: 12 V 24 V adaptive Battery voltage: 9 32 V Solar maximum input VOC: 100 V MPPT voltage range: Battery voltage +2 V to 100 V No load loss: <= 0.4 W Conversion efficiency: <= 98% MPPT tracking efficiency: > 99% USB output: 5 V 3 A (dual) Temperature compensation coefficient: 2 mV per C per 2 V (default) Operating temperature: 10 C to +65 C Protection: IP21 This controller is intended for off grid photovoltaic systems requiring efficient MPPT charging, configurable control, and robust protection.