Note:It is high quality compatible MPPT + PWM Solar Controllers ,not 100% Ture MPPTThe controller is 12/24/36/48V auto, but the voltage of the photovoltaic panels used to charge different batteries is different For 12V batteries, use about 18V photovoltaic panels, for 24v batteries, use about 30-37V photovoltaic panels, and for 48V batteries use 60 For photovoltaic panels around -72V, the controller wiring is connected to the battery first, and then to the photovoltaic panel Disconnect the wire on the contrary, otherwise it will easily cause damage to the controller Description of charging protectionWhen using a 12V battery, the boost charging voltage of the battery is higher than 14 8V, and it is converted to a floating charging voltage of 13 8V When using a 24V battery, the battery boost charging voltage is higher than 29 6V, and it changes to a float charging voltage of 27 6V When using a 36V battery, the battery boost charging voltage is higher than 44 4V, and it changes to a floating charging voltage of 41 4V When using a 48V battery, the battery boost charging voltage is higher than 59 2V, and it changes to a floating charging voltage of 55 2V Note: Please connect the battery to the controller first, and then the photovoltaic panel to ensure that the battery voltage is higher than (12V battery is higher than 10V; 24V battery is higher than 20V; 36V battery is higher than 30V; 48V battery is higher than 40V), otherwise it will cause voltage Identification error Colour:blackMaterial:plastictype: 60APackage Contents:1 x Solar MPPT ControllerOnly the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm