From the cost point of view, household charging piles are mostly AC electric piles. So today I will talk about household communication piles, and I won’t go into details about DC piles. Before discussing how to choose a charging pile, let's talk about the classification of household communication charging piles.

Classified according to the installation method, it is mainly divided into two types: wall-mounted and portable. The wall-mounted type needs to be installed and fixed in the parking space. According to the size of the power, the mainstream is 7KW, 11KW, and 22KW. 7KW means charging at 7 kWh, which is equivalent to about 40 kilometers, 11KW means charging at 11 kWh, which is equivalent to about 60 kilometers, and 22KW means charging at 22 kWh, which is equivalent to about 120 kilometers. Portable, as the name suggests, it can be moved, does not require fixed installations, does not require wiring, and can directly use household sockets, but the current is relatively small, 10A and 16A are commonly used. The corresponding power is 2.2kW and 3.5kW. The price difference of charging piles is relatively large, ranging from hundreds to thousands, resulting in a price difference. What matters is the difference in rights. The price of 11KW is above 3000, the price of 7KW is between 1500-2500, and the price of 3.5kW portable is below 1500. After combining the two factors of model adaptation and home charging environment, you can basically choose the charging pile of the required standard, but even under the same standard, there will be a double price gap.

With this understanding, let's discuss how to choose a suitable home charging pile: First, consider the adaptability of the model

Household charging piles: Although all charging piles and car charging interfaces are made in accordance with the new national standard, they match when charging. However, the maximum charging power that different models can withstand is not determined by the charging pile, but by the on-board charger in the car. In short, if your car can only withstand 7KW, even if you use 20KW, the charging pile can only get 7KW.

Home charging piles: There are generally three types of cars: (1) pure electric or hybrid models with small battery capacity. The power of the on-board charger is 3.5kW, and generally 16A and 3.5kW piles can meet the demand; the 7kW power on-board charger for pure electric vehicles with large battery capacity or range-extending hybrid can be equipped with 32A and 7kW charging piles; the battery life is relatively high For pure electric vehicles, in addition to considering the matching of vehicles and piles, we should also understand the electricity situation in our own community. The 7KW charging pile is 220V, so a 220V meter can be requested. When the charging pile with a power of 11KW and above is 380V, a 380V electric energy meter is required.

Household charging pile: At present, most residential areas can request 220V ammeters, and villas or self-built houses can request 380V ammeters. Whether it is possible to install an electric energy meter, and what type of electric energy meter to install, you need to first apply to the property and power supply bureau (if the application is passed, the power supply bureau will install the electric energy meter for free) for advice, basically based on their opinions.