MPPT 40A output Solar Battery Charge Controller 12V/24V with LCD dc Watt Meter Helior 40A mppt solar controller adopts MPPT technology (Maximum Power Point Tracking). The advanced tracking algorithm make the solar panel operate at ideal voltage It can increase charge current up to 30% or more compared to PWM controllers Maximum Solar PV Input Power: 12V System 600W; 24V System 1200W; Electronic protections: overvoltage, reverse polarity, over current, excessive temperature and short circuit protected Included Items: (1) 40A Helior MPPT Solar Charge Controller, (2) Battery Temperature Sensor, (3) LCD dc Watt meter, (4) Owner's/Installation Manual (1 year warranty)