pwm 30a 48v solar charge controller for solar power system Features. 1,With relay function ... SP-50A PWM SDPC-SP-60A PWM Rated charge current 30A 40A 50A 60A Rated load ... 24V; Temperature compensation -5mv/°C/cell (Boost charge, Direct charge, Float charge, charge return voltage); Lower voltage indicate 12.0V; ... ; ×2/24V Control mode PWM charge mode; modified discharge voltage by the discharge rate