Wide Compatibility: The solar charger controller with a rated discharge current of 20A is automatically compatible with 12V or 24V systems, suitable for lead-acid batteries: OPEN, AGM, GEL. Not suitable for NiMH, Lithium, Li-ion or other batteries. Reliable Protection: The solar charge regulator provides overcurrent protection, short circuit protection, reverse connection protection, low voltage and overcharge protection, providing reliable protection for your equipment. Intelligent: Built-in industrial microcontroller for automatic management, memorizes various parameters set by the user, and the data will not be lost when the battery is exhausted. Once the voltage is too low, the solar controller will automatically shut down. Functional LCD Display: Intuitive LCD display, which can clearly display the status and data, is able to switch modes and parameter configurations, suitable for home, industry, commerce, etc. Easy to Use: The charge controller should be connected to the battery first, then the solar panel, and finally the load! You can change the settings with a simple one-button operation. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.