Item Type: DC Voltage Regulator_x000D_Material: Aluminum alloy_x000D_Model: BS1228H840H_x000D_Input Voltage: 12V_x000D_Output Voltage: 28V_x000D_Output Current: 30A_x000D_Output Power: 840W_x000D_Working Temperature: -40-85_x000D_Waterproof Rating: IP68 1Come with short circuit protection, under normal trial, the output of the converter will be short circuited to the ground instantaneously, which will not cause damage to the power converter 2When the abnormal output voltage of the power supply is higher than the set value, the protection will work to protect the load and electrical appliances from damage 3The overcurrent protection prevents the power module from being damaged when the output load current is too large. Reduce the damage rate of the power supply 4Input voltage 12V with output voltage 28V, Output current is 30A, output power for 840W 5The product can withstand ?40?85 working temperature, waterproof grade is IP68, very durable 1 x DC Voltage Regulator 4 x Terminal 1. Please correct wiring and installation, and confirm that the positive and negative polarities of the input and output are correct before powering on to work._x000D_2. The battery power at the input end is within the input voltage range and the power is sufficient to ensure the normal operation of the power converter._x000D_3. Please install in a well ventilated environment to avoid over temperature protection of the power converter due to heat accumulation.