PWM for entry level market. The SC30 / SC30LVD is our most affordable and basic PWM charge controller for a wide range of applications. Its built-in LED display shows battery voltage, solar charge current, total solar charge amp-hours and can be used to program charge settings. The SC30LVD version provides a programmable signal output to manage DC load with low voltage disconnect or our dusk-to-dawn control for PV street lighting. A perfect entry level controller!