When EP500 or EP500Pro is plugged into a home wall outlet, the power output will be limited by the current of the wall plug. The power of output is subject to: If your home's socket features 120V/15A, the equipment carried by EP500 or EP500Pro cannot exceed 1800W. If your home socket features 120V/25A, then EP500 load equipment can be no more than 2000W, and EP500Pro can be 3000W for safety.