The EB-MPPT-20 (M) from Morningstar Corporation is a Solar Charge Controllers with System Voltage 12 to 24 V, Rated Current 20 A, Power Rating 300 to 600 W, Efficiency 98 %, Operating Temperature -40 to 60 Degree C. Tags: Maximum Power Point Tracking (MPPT). More details for EB-MPPT-20 (M) can be seen below.