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 1100W PV Input: Recommended for solar arrays up to 550W (12V) or 1100W (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 Electronic Protection: Protects against reverse polarity, overcharging, overload, short circuit, and reverse current. Lithium Battery Recovery: Capable of charging over-discharged lithium batteries. Designed for Long-Term Reliability: Durable construction for reliable performance in demanding off-grid applications Specifications Nominal System Voltage: 12V/24V Auto Maximum Charging Current: 40A Rated Load Current: 20A Maximum Recommended PV Input Power: 550W (12V) / 1100W (24V) Maximum Solar Input Voltage: 100V (25°C), 90V (-25°C) Maximum PV Input Short Current: 50A Maximum Battery Voltage: 32V Battery Voltage Range: 9V to 35V MPPT Tracking Efficiency: >99% Conversion Efficiency: ≤98% Battery Compatibility: Sealed, Gel, Flooded, Lithium Communication: RS232 (Optional BT-1 Bluetooth Module) Protection Rating: IP32 Maximum Terminal Size: 8 AWG Net Weight: 4.41 lb Dimensions (L × W × H): 9.37 × 6.81 × 2.85 in Package Dimensions: 12 × 9 × 6 in Gross Weight: 6 lb