1、The solar controller has the functions of short circuit protection, open circuit protection, reverse protection, overload protection, etc. 2、3‑stage PWM charging management, effectively improving system efficiency and extending battery life. 3、Once the battery voltage drops below 8V, the solar controller will automatically shut down to protect the battery. 4、Equipped with an LCD display, which can clearly display status and data, and easily switch modes and parameter settings. 5、The charge controller should be connected to the battery first, then to the solar panel, and finally to the load. Item Type: Smart Charge Controller Material: ABS Model: GLL1210 Uses: Suitable for home, industry, commerce, etc. Rated Voltage: 12/24V Maximum Photovoltaic Voltage: 50V10A Solar Panel Power: 130W (12V) 260W (24V) 20A Solar Panel Power: 260W (12V) 520W (24V) 30A Solar Panel Power: 390W (12V) 780W (24V)USB Output: 2 USB outputs, 5V/2.5A (maximum) 1 x Smart Charge Controller 1 x User Manual