Vehicle charging stations are generally divided into AC charging stations and DC charging stations. The biggest, or rather the only, difference between the two is that one is a slow charging station and the other is a fast charging station. An AC charging station takes 7-10 hours to fully charge, while a DC charging station only takes 1-2 hours.
In terms of charging time, DC charging stations have a significant advantage, with their fast charging speed being particularly attractive.
However, considering all factors, the two types of charging piles each have their own application scenarios, and the market for AC charging piles appears to be larger.
For AC charging piles, firstly, they are low in cost, relatively simple to install, and do not place a large load on the transformer. They can be directly installed in the community's distribution cabinet.
The maximum charging power of AC charging stations is 7kW. Most electric vehicles support AC charging and have two charging ports: one for fast charging and one for slow charging. However, some non-standard electric vehicles may only have AC charging ports and cannot use DC charging stations.
DC charging stations convert 380V power into a high-current DC charging voltage through a transformer. The maximum charging current can reach 32A, and the charging power can reach 45 kilowatts. Generally, electric vehicles can be fully charged in one to two hours, which does not take too long.
While DC charging stations are convenient, they have a major drawback: installation is quite complicated. Because DC charging stations have high charging power, they require a high-capacity power source, necessitating transformers with sufficient load capacity to support such high power. Many older residential areas lack the necessary wiring and transformers for this purpose, making installation impossible.
However, it's important to note that DC charging stations represent the future trend in the charging station market. Coastal cities have already begun deploying them, contracting parking lots to install and operate charging stations. The investment cost for a single car charging station is tens of thousands of yuan, and a parking lot can require an investment of hundreds of thousands of yuan. Currently, DC charging stations are in high demand and short supply, and parking lot utilization rates are extremely high; the equipment can typically recoup its cost within a year.
In general, both DC charging piles and AC charging piles have their own advantages. For newly built residential areas, DC charging piles can be planned directly. For older residential areas, AC charging piles should be used. This way, the charging needs of users can be met without putting a heavy load on the community transformer.
