Features 1Innovative MPPT Design: Die cast aluminum design ensures excellent heat dissipation and energy maximum power point tracking technology with tracking efficiency up to 99% and peak conversion efficiency up to 98%. Even in a cloudy environment, where the solar panel's maximum power point fluctuates throughout the day, this is the best charging solution. 212V 24V Automatic Detection: Automatic detection of 12V or 24V system voltage, LCD screen and multiple LED indicators display solar charging and battery operation information, customizable parameters and error codes. 3System Wide Protection: Self diagnostics evaluate and protect your system against reverse polarity, battery overcharge, battery overdischarge, overload, short circuit, and reverse current. 4Level 4 Safe Charging: Level 4 charging of acid batteries (bulk, absorption, floating charge and equalization), level 2 charging of lithium batteries (bulk and absorption) and lithium reactivation. 5Multiple Load Controls: Connect DC appliances directly to optional load terminals and monitor consumption or set timer controls directly from the controller. Specification Item Type: 12V 24V MPPT Solar Charge ControllerWeight: 1452g/51.2ozMaterial: Aluminum alloyPower: 12V: 260W; 24V: 520WProduct Size: 210 x 151 x 59.5mm/8.27 x 5.94 x 2.34inOpening Position: 154 x 131mm/6.06 x 5.16in Package List 1 x Host1 x Connecting Cable2 x Instructions