High Power Switching Power Supplies MEAN WELL High Power Switching Power Supplies offer more than 1000W outputs with built-in active PFC function. MEAN WELL's full line of high power switching power supplies offer high efficiency of up to 92% (depending on model) and voltage optimization can be trimmed. MEAN WELL High Power Switching Power Supplies offer forced-air cooling via a built-in fan with speed control function and a built-in remote ON/OFF control and remote sense. A variety of protections are available, including short circuit, overvoltage, overtemperature, and overload. These power supplies are UL/CUL/TUV/CB/CE approved.