1.3. Both the input and output use frequency capacitors, featuring low output ripple, minimal heat generation, and long lifespan. The main insulating plate of the power tube is made of aluminum oxide, offering ten times higher thermal conductivity than conventional insulating plates. Three indicator lights: undervoltage, overcurrent, and operation status, making the operational state clearly visible at a glance. 2.1. By utilizing wing heat dissipation, the heat dissipation effect is , and the output power is (the power can reach approximately 1800W with a 48V input and added fan). MLCC ceramic capacitors have been added to the input and output, significantly reducing output ripple, which is about 100 millivolts when converting 48V to 72V at 4A. 3.4. Three 20A input fuses are connected in parallel to protect the output from accidental short circuits. The use of a large package 100V 210A to 247 power tube provides ample power reserve and dynamic response. The undervoltage protection is adjustable, capable of protecting various batteries and also suitable for solar panels. 4.2. The output voltage is approximately 19V, current about 30A, and undervoltage protection around 10.5V. The temperature controlled fan, combined with a fluid bearing fan, achieves a good balance between noise and heat dissipation. At low load, the fan does not rotate. Under load and temperatures around 60 degrees, the fan automatically activates, effectively reducing noise and extending lifespan.