Features Automatically identify 12V/24V system voltage. Full 3-stage PWM charging management. Dual MOS anti-backflow circuit, low calorific value. The terminals are marked with corresponding icons for connecting batteries, solar panels and DC loads. Built-in short circuit protection, open circuit protection, reverse polarity protection, overcurrent protection. Features: -Automatically identify 12V/24V system voltage. -Full 3-stage PWM charging management. -Dual MOS anti-backflow circuit, low calorific value. -The terminals are marked with corresponding icons for connecting batteries, solar panels and DC loads. -Built-in short circuit protection, open circuit protection, reverse polarity protection, overcurrent protection.   Specification: Model: CM3024Z Max discharge current: 30A Batt voltage: 12V/24V auto Charging Type: PWM Material: PVC Color: Black Size: Approx. 190*90*50mm / 7.5*.3.5*1.9in Weight: Approx. 373g / 13.1oz   Package list: 1 * Solar Charge Controller 1 * Manual   Package List