Fast charging contributes to increasing a charging speed by supplying DC power directly from the charger to the battery. Fast chargers with 50kW-class performance are mainly used in Korea and are mainly installed at express rest areas or public institutions. It can be charged up to 80 percent within an hour, and the charging method and specifications are different in accordance with manufacturers and vehicle models. The 350kW-class high-power charging technology is distributed for faster charging speed. Some manufacturers introduce a technology that significantly improves the charging speed as well as power efficiency by raising the voltage to 800V. The Hyundai IONIQ 5 or Kia EV6 equipped with an 800V system can charge the battery from 10 percent to 80 percent in 18 minutes and showcase excellent charging efficiency by running more than 100 km in just 5 minutes of charging.