Need to connect to the outlet for external discharge. BYD Yuan EV can be discharged externally. BYD new energy vehicles all have the function of external discharge and need to be connected to the power strip for external discharge. BYD's so-called reverse charging is actually an external discharge function, which can provide 220V/15kw power supply to the outside world. Cars with 220V power output are not a patent of BYD Auto, but BYD has further developed bidirectional inverter charging and discharging technology based on this idea. This technology has applied for 42 related patents.