Description: 1. Build-in industrial micro chip. 2. LED display, showing working status. 3. Full 3-stage PWM charge management. 4. Buil-in short-circuit protection, open-cirouit protection, reverse protection, over-load protection. 5. Dual MOS Anti-backfilling circuit, low heat production. Feature: 12/24V Auto Switch Solar Controller,automatic detection of the voltage. This solar charge controller is great for household power generation system. Made of high quality ABS material, not easy to aging, safe and durable,convenient installation. When the battery voltage is low, the controller will automatically cut off the load from the system. Safety systems provides overcharge protection, short circuit protection, over-load protection and reverse protection. This controller is only suitable for all kinds of lead-acid batteries(including openings, seals, colloids, etc )and lithium batteries. Specification: Voltage: 12V/24V Auto Adapt. Rated Current: 10A, 20A, 30A, 40A, 50A. Rated Discharge Current: 10A, 15A. Photovoltaic Voltage: 12V Battery For 18V Solar Panel / 24V Battery For 36V Solar Panel. Self-consumption: <10mA. Size/Weight: 103X96X35MM/95g. Working Temperature: -35℃-85℃. Package included: 1 X Solar Charger Controller. 1 X English Manual