Unlike PWM controllers, The MPPT technology increases the charge efficiency up to 20% and potentially decrease the power of solar array needed.Compatible for PV systems in 12V, 24V or 48VMaximum charging current up to 30A / 45A / 60A / 80A / 100A / 120AAutomatic battery voltage detection(Lithium battery voltage needs to be set manually)Supports lithium battery and various lead-acid batteries, AGM and gel batteryIntegrated intelligent slot compatible with MODBUS communicationCaution, risk of electric shock, energy storage timed discharge.Charging stages are ; Bulk, Absorption, Float