High-efficiency 20 A dual-battery MPPT solar charge controller with LCD for solar arrays up to 260W (12 V) / 520W (24 V).

• Dual-battery charging: high-power charge to main battery and trickle charge to secondary battery up to 1 A — ideal for engine and leisure banks.
• Advanced MPPT: >95% conversion efficiency; wide PV input up to 100 V; max PV power 260W (12 V) / 520W (24 V).
• Full range of protection functions: prevents reverse current, over-charging, short circuit and reverse polarity; IP33 water-resistant when installed.
• Broad battery compatibility: Gel, AGM, flooded lead‑acid and Lithium (LiFePO4, Li‑NiCoMn) batteries supported.
• Automatic 12/24 V recognition — note the two battery banks must have the same rated voltage (both 12 V or both 24 V).
• Controller specifications: current limiting function 20 A; self‑consumption <26 mA; negative common ground; RS485 communication port.
• Operating range: -30°C to +80°C (-22°F to +176°F).
• Dimensions: 243.7 x 158 x 63 mm (9.6 x 6.2 x 2.5 in); mounting dims 180 x 149 mm; weight 1.1 kg (2.4 lb); multiple 5 mm mounting holes.
• LCD display for status and configuration; ideal for campervans, motorhomes and boats.

Refer to the supplied manual for detailed wiring and operation. Ensure both battery banks share the same nominal voltage before installation.