1. Material: The product housing is made of durable ABS material, corrosion and shockproof, ensuring longlasting protection for connectors against corrosion and short circuits. This MPPT solar charge controller is compatible with 12V or 24V leadacid batteries, AGM batteries, gel batteries, calcium batteries, and lithium iron phosphate batteries. 2. MPPT Controller Performance: Features charging efficiency with a maximum MPPT tracking efficiency of 99%. Supports a maximum PV panel voltage of 50V and an autoadaptive system battery voltage range of 12V/24V. Rated current: 20A, USB output: 5V/2.4A, operating temperature range: 20°C to 50°C. 3. Safety: Equipped with overcharge protection, overdischarge protection, temperature protection, shortcircuit protection, reverse polarity protection, and surge protection. Ensures comprehensive safety from the solar panel to the load connection. 4. Fast Heat Dissipation: Features a thickened aluminum alloy heat sink for rapid heat dissipation during charging, maintaining regulator performance. When properly connected, both the solar panel and load indicator lights will glow green; incorrect connections will prevent illumination.