Stackable 12V/24V 40A MPPT Solar Charge Controller

An MPPT, or maximum power point tracker, is an electronic DC to DC converter that optimises the voltage match between your solar panels, battery bank and load. This results in your panels operating at their optimum power output to get maximum charge current into your battery - providing higher efficiency of up to 97%. What does that mean in real world terms? It means up to an extra 20-40% gain in charging power in winter, and up to an extra 10-20% gain in charging power in summer, when compared to a regular PWM (pulse width modulated) charge controller. The features of this 40A MPPT charge controller also allow for a wide array of applications and systems, with variable battery mode selection and operation modes, as well as low voltage disconnect and reconnect for the connected load output (15A max). To make this unit even more flexible, multiple units can be stacked in parallel to increase current capacity. Suitable for 12V or 24V systems.Features:• Intelligent MPPT technology• Automatic system voltage detection (12V or 24V)• Stackable to increase current capacity• 3-stage charging (bulk, absorption, float)• Reverse polarity, over temperature, over current, overcharge and overload protections• Optional battery temperature sensor for charging compensation (MP-3738)• Low voltage disconnect/reconnect for connected load• Selectable equalisation charge• LED indicators for charge status, operation mode and fault detectionNOTE: This unit cannot charge a 12V battery from a 24V solar panel, or vice-versa. Battery bank and solar panels must have the same nominal voltage.SpecificationsRated system voltage 12V or 24VDCRated charge current 40AMax load current 15APV input voltage range 15-55VDCMax PV open circuit voltage 55VDCTypical idle consumption Efficiency up to 97%Dimensions 192(L) x 140(W) x 66(D)mm