Features: * 12V/24V automatic recognition. * Built-in overheat/short circuit protection, reverse polarity protection. * LCD screen one-button to complete the operation of the battery, fully charged, automatic disconnection, automatic memory data storage. * Four-stage mppt regulated charging, high-power multi-phase mppt charging module, high stability, charging efficiency up to 97%, multi-stage charging controller mode, control parameters can be set. * Suitable for solar power systems, smart homes, solar chargers, solar monitoring systems, solar light boxes, solar billboards, solar warning lights, etc. Specification: Name: Solar Controller Rated charging current: 40A Solar panel maximum open circuit voltage: 100V (at the lowest temperature), 92V (at the normal temperature of 25°) System rated voltage: 12V/24V automatic identification Maximum battery voltage: 8-32V Photovoltaic panel maximum input function: 520W(12V), 1040(24V) Static loss: ≤50mA High voltage protection: lead-acid battery 16V Light control point voltage: 5V/10V/15V/20V Temperature compensation coefficient: -4mV/°/2V (25°C) Discharge circuit pressure drop: ≤0.2V Display temperature range: -20°C~+70°C Working environment temperature range: -20& 8451;~+55& 8451; Storage environment temperature: -30& 8451;~+80& 8451; Working environment humidity: ≤90% without condensation Protection class: IP30 Grounding Type: Positive Grounding Installation size: 133*130mm Installation hole diameter: 5mm Terminal wire diameter: 16mm²/5AWG Size: 215*145*75mm Packing included: 1 * Solar Controller Note: 1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.