- Material and durability: The housing is made of durable ABS material that is corrosion and shockproof, protecting the connectors from corrosion and short circuits. Compatible with 12V or 24V lead-acid batteries, AGM, gel, calcium, and lithium iron phosphate batteries. - MPPT performance: High charging efficiency with a maximum MPPT tracking efficiency of 99%. Maximum PV panel voltage 50V. System battery voltage range auto-adapts to 12V/24V. Rated current 20A. USB output 5V/2.4A. Operating temperature range from -20°C to +50°C. - Safety protections: Includes overcharge protection, over-discharge protection, high temperature protection, short circuit protection, reverse polarity protection, and surge protection. Provides comprehensive protection from the solar panel to the load connection. - Heat management: Thickened aluminum alloy heat sink for fast heat dissipation, maintaining proper regulator operation. When correctly connected, both the solar panel and the load indicator lights illuminate green; incorrect connections may prevent this. - Use scenarios: Ideal for off-grid setups in remote cabins, RVs or motorhomes, and boats or caravans. Suitable for small backup power systems at home or in workshops, especially with lithium iron phosphate or various lead-acid batteries.