Do you know how to choose a home charging pile?

Considering the cost, most of the charging piles for household cars are AC piles. So today I will talk about household AC piles, and I will not go into details about DC piles. Before discussing how to choose a pile, let’s first talk about the classification of household AC charging piles by installation method, which are mainly divided into two categories: wall-mounted and portable. The wall-mounted type needs to be installed and fixed on the parking space, and it is divided by power. The mainstream is 7KW, 11KW, 22KW. 7KW stands for 7 kWh in 1 hour, which is approximately equivalent to 40 kilometers. 11KW represents 11 kWh in 1 hour, which is approximately equivalent to 60 kilometers. 22KW represents 22 kWh in 1 hour, which is approximately equivalent to 120 kilometers. Mobile, no fixed installation, no wiring, direct use of household sockets, but the current is relatively small, 10A, 16A is the most commonly used. The corresponding power is 2.2kw and 3.5kw. With this understanding, let’s discuss how to choose a suitable charging pile: First, consider the degree of adaptation of the vehicle model Although all charging piles and car charging interfaces are now manufactured according to the new national standard, they are all 100% mutual. match the charging. However, the maximum charging power that different models can accept is not determined by the charging pile, but by the on-board charger in the car. In short, if your car can only accept a maximum of 7KW, even if you use a 20KW power charging pile, it can only be at a speed of 7KW. Here, the cars are roughly divided into 3 types: ① pure electric or hybrid models with small battery capacity, represented by Hongguang mini, on-board charger power 3.5kw, generally 16A, 3.5KW piles can meet the demand.


② Pure electric models with larger battery capacity or extended-range hybrids (such as Volkswagen Lavida, Ideal ONE), with a power of 7kw on-board chargers, can match 32A, 7KW charging piles;


③Pure electric models with high battery life, such as Tesla’s full range and Polestar’s full range of on-board chargers with a power of 11kw, can match the 380V11KW charging pile.


The second thing to consider is the home charging environment. In addition to considering the adaptation of the car and the pile, you should also understand the power situation of your own community. The 7KW charging pile is 220V, and you can apply for a 220V meter, while the 11KW or higher power charging pile It is 380V, you need to apply for a 380V meter. At present, most residential quarters can apply for 220V meters, and villas or self-built houses can apply for 380V meters. Whether or not the meter can be installed, and what type of meter to install, you need to apply to the property and power supply bureau first (the application is approved, and the power supply bureau will install the meter for free) for opinions, and their opinions shall prevail.


The third thing to consider is that the price of charging piles varies greatly, ranging from hundreds to thousands, causing price differences. The most important thing is the difference in power. The price of 11KW is about 3000 or more, and the price of 7KW is 1500- 2500 range, 3.5KW portable price below 1500. After combining the two factors of the adapted model and the home charging environment, the charging pile of the required specification can basically be selected, but even under the same specification, there will be a price gap of 2 times. What is the reason for this gap?


First of all, the brand power and premium of different manufacturers are definitely different. How laymen distinguish the brand from the quality depends on the certification. CQC or CNAS certification means compliance with relevant national requirements and regulations, and it is also an important indicator for car companies to evaluate when selecting supporting suppliers. Secondly, the materials used in the products are different. The materials used here include three aspects: shell, process, and circuit board shell. Many household charging piles are installed outdoors, not only to deal with high temperature or low temperature environments, but also to prevent rain and lightning, so the protection level of shell materials The grade should not be lower than IP54, and in order to adapt to various bad weather and deal with changes in temperature difference, the material is PC board, which is not easy to become brittle, and can better withstand high temperature and aging. The piles with good quality are generally made of PC material, and the quality is generally made of ABS material, or PC+ABS mixed material. , it will crack as soon as it is dropped; the inner terminal of the brand manufacturer’s gun head is silver-plated, with good conductivity, and the number of times of plugging and unplugging exceeds 10,000 times, which is durable, while the ordinary manufacturer’s gun head is nickel-plated, which is easy to damage. Circuit board: The circuit board of the high-end pile is an integrated circuit board, and there is only one board inside, and it has undergone high-temperature durability experiments, which is relatively reliable, while the circuit boards of ordinary manufacturers are non-integrated and may not have undergone high-temperature experiments.


The last start-up function is different from the conventional start-up methods, including plug-and-charge and credit card charging. Plug and charge is not secure enough, and there is a risk of electricity theft. Swiping the card to charge will need to save the card, which is not very convenient. At present, the mainstream startup method is to make an appointment for charging through the APP, which is both safe and can be charged on demand, enjoying the dividends of the valley electricity price. The powerful charging pile manufacturers will develop their own APP, from hardware to software, to provide comprehensive services to customers. After reading the above, do you know how to choose a charging pile? If you still don’t understand, please contact me!E-mail:info@moreday.com.


Post time: Jul-07-2022

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