Item Type: PV Controller Material: ABS Weight: Approx. 282g / 9.95oz Size: Approx. 17 x 9.5 x 3.7cm / 6.69 x 3.74 x 1.46in Voltage: 5V Short Circuit Current: 2A System Voltage: 12V or 24V self adaptation Package List 1 x MPPT PV Controller 1 x Instruction Manual 1Storage Function: The photovoltaic controller has a built in industrial microchip with excellent storage function and large screen LCD display. 2Digital Power Technology: The charge and discharge parameters of the PV controller are controllable, and the circuit energy conversion efficiency is up to 98% with digital power technology. 3Accurate Tracing: When the panel is shaded or part of the panel is damaged, there will be two or more peaks, and the controller can still accurately trace the maximum point power. 4Multi Protection: This PV controller is equipped with internal overcurrent and shortcircuit protection, reverse connection protection, reverse current protection, etc. It produces little heat to ensure safe use. 5Tracing Efficiency: Our PV controller can accurately trace to the proper working point within 1 second, and the MPPT tracing efficiency can be up to 99.9%.