In a word? Powerful function/Strong protection/high-quality material/well-built solar charger controller.
12/24V Automatic self-adaption?Big lcd display?2 usb output 5v Current-Adaptive under 3A
PWM charge management
High qulity material?safty consideration?easy to install,easy to use.
Short-circuit protection?Overload protection?Overcharge protection/Over discharge protection?Voltage low protection?Anti reverse charge protection/Anti reverse connection protection