New energy vehicle charging 16a with 2.5 square charging cable. If the distance is too long, it is necessary to consider the problem of charging current, 2.5 square can load 16A-25A about 5.5kw power; 4 square can load 35A-40A about 8kw of power.
Charging line several square refers to the cross-sectional area of the wire, 2.5 square and 4 square can support high-power household appliances. If from the price point of view, the short distance is recommended to use 4 square, because the price and 2.5 square is not much different.