This MPPT solar charge controller delivers efficient, reliable charging for off grid solar systems. It uses an advanced MPPT algorithm to extract maximum power from photovoltaic panels and supports flexible battery setups for 12 V and 24 V systems. Available current ratings: 20 A, 30 A, and 40 A. Maximum PV input voltage: 100 VDC. Key benefits Maximizes harvested solar power with fast, accurate MPPT tracking for higher battery charging efficiency. Supports multiple battery types and charging modes for compatibility with a wide range of systems and applications. Built in data recording and RS485 communications enable monitoring and integration with external systems. Automatic 12 V and 24 V detection simplifies installation and setup. Features and performance MPPT tracking efficiency not less than 99.5 percent for precise maximum power point follow up. Peak conversion efficiency up to 97 percent for minimal energy loss. Rapid MPPT response combined with multi peak recognition for consistent performance in varied light conditions. Handles photovoltaic array input up to 100 VDC while managing maximum input power to keep operation within device limits. Automatic system voltage identification 12 V or 24 V. LCD display shows real time operation data and device status for quick diagnostics. Battery temperature compensation to optimize charge settings according to temperature. Power statistics recording for run time and energy tracking. RS485 communication interface for remote monitoring and control. Charging modes and battery compatibility Charging modes: general mode, light control mode, dual time mode, pure charger mode, and sync mode. Battery types selectable: Sealed, GEL, Flooded, and Li(NiCoMn) O2. Technical summary Available models: 20 A, 30 A, 40 A. Nominal battery systems: 12 V and 24 V automatic detection. Maximum photovoltaic open circuit voltage: 100 VDC. Interface: LCD display and RS485 communications. Functions: MPPT tracking, battery temperature compensation, multiple charging modes, power statistics. Practical use scenarios Residential off grid or backup power system where maximizing PV yield and flexible charging options are required. Street lighting and outdoor fixtures such as patio lamps where reliable automatic charge control and light control modes are useful. Remote installations like communication base stations or traffic signal controllers that need consistent charging, monitoring, and RS485 integration. This controller is suited for installers and system integrators who need an efficient MPPT solution with configurable charging profiles, temperature compensation, and remote communications for 12 V and 24 V solar battery systems.