Features Efficient MPPT Solar Charging Up to 99% MPPT Tracking Efficiency: Maximizes solar energy harvest under changing sunlight conditions. Up to 98% Conversion Efficiency: Converts more solar power into usable battery charging energy. Supports up to 520W PV Input: Recommended for solar arrays up to 260W (12V) or 520W (24V). Flexible System Compatibility 12V/24V Auto Detection: Automatically identifies the system voltage during installation. 100V Max Solar Input Voltage: Supports flexible solar panel configurations. Supports Multiple Battery Types: Compatible with Sealed, Gel, Flooded, and Lithium batteries. User-Friendly Operation LCD Display with LED Indicators: Displays charging status, battery information, operating parameters, and fault codes. Bluetooth Ready: Supports the optional BT-1 Bluetooth module via the RS232 communication port for wireless monitoring. Die-Cast Aluminum Housing: Provides efficient heat dissipation for reliable operation. Comprehensive Reliability Advanced Electronic Protection: Protects against reverse polarity, overcharging, overload, and short circuit. Lithium Battery Recovery: Capable of charging over-discharged lithium batteries. Designed for Long-Term Reliability: Durable construction for demanding off-grid applications. Specifications Nominal System Voltage: 12V/24V Auto Rated Battery Current: 20A Rated Load Current: 20A Max. PV Input Short Current: 25A Max. Battery Voltage: 32V Max Solar Input Voltage: 100 VDC Discharge Circuit Voltage Drop: ≤0.15 V Max. Photovoltaic System Input Power: 260W/12V, 520W/24V Conversion Efficiency: ≤98% MPPT Tracking Efficiency: >99% Operating Temperature: -35℃ to +45℃ Protection Degree: IP32 Net Weight: 3.08 lb Overall Dimensions: 8.27 x 5.94 x 2.34 in