Features Great Charging Efficiency --- MPPT PV solar controller can provide great charging efficiency. Maximum charging efficiency of 98% solar photovoltaic cells can be achieved. Intelligent Protection --- MPPT PV solar controller is with intelligent protection functions, such as overcharge, overdischarge, overload, etc. Automatically Identify --- MPPT solar charging controller can automatically identify 12V or 24V batteries and realize automatic voltage regulation charging. Simple to Install and Operate --- This MPPT solar charging PV controller is simple for installation and easy to operate. Friendly to novices. Made of Plastic Material --- Our solar charging controller is made of plastic material with excellent workmanship and robust. Specification: Item Type: Controller Material: Plastic Size: Approx. 19 x 10 x 5cm / 7.5 x 4 x 2in Use: For solar photovoltaic charging system Package List:1 x Solar Charging Controller Package List 1 x Solar Charging Controller