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Why did a 3-phase EV charger only output 1-phase current?


THE CHANLLENGE

Recently, a French customer purchased a batch of BESEN’s EV charging stations with sockets. The rated maximum power of them was 11kW. But he told us that during the sales process, one of his clients had a problem: After the charger was installed and everything was ready, the product only output 3.5kW, leaving him disappointed and hoping we could give a solution.

 

THE SOLUTION

After receiving the customer's feedback, we immediately got in touch with him. After confirming the information, to better solve the problem, we asked the customer to help us  do some necessary checks.

And here were the results:

1. The household power supply was 3-phase; the EV charging station was correctly wired to the distribution box, and there was no fault;

2. The user's car model was Tesla Model 3, which supports 3-phase AC charging, and there was no fault;

3. The charging cable matched with the BESEN’s EV charging station was of other brand, the cable specification was: diameter 11.7mm; size 3*2.5mm²+1*0.5mm², which only supported the transmission of 1-phase current. And this was exactly why the problem occurred.

 

We told the customer the result and explained the cause: the charging cable was 1-phase, when a 3-phase EV charger was matched with the cable to charge a car, it could only output 1-phase current. Then he thanked us and prepared to buy a batch of 3-phase, 11kW EV charging cables from us. We recommended the most suitable one for him at a favorable price.

 

SUMMARY

Every car owner hopes to match their car with an EV charger with high charging current and fast charging speed, but when you are choosing, we suggest that you first confirm the maximum charging current that the car supports and the household power supply before picking a best-fit charging cable for your EV charger.


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