AC and DC chargers have different levels of charging power that results in dissimilar charging times, speeds and efficiency
The charging rate for an AC charger depends on the capacity of the EV’s battery. AC refers to alternating current meaning the current goes in many different directions. It is the most common form of electrical power found in households. Most household appliances run off of AC power.
Let’s say, a particular EV’s battery is rated at 3.6 kW. If so, the EV’s battery can accept no more than 3.6 kW per hour in power from an AC charger. Even if the AC charger is 20 kW, the battery will only accept 3.6 KW per hour and will not charge the vehicle any faster than a 3.6 kW charger.
On the other hand, a DC charger uses direct current, which is the same type of power that Lifepo4 batteries, like those used in EnerJet systems, operate on. Solar panels also run on DC power. In a typical solar power setup, the DC energy generated by the solar panels and stored in batteries must be converted into AC power through an inverter to be compatible with household appliances. EnerJet systems simplify this process by offering an all-in-one solution, combining both a Lifepo4 battery and a built-in inverter, ensuring efficient conversion of DC to AC power, making it easier to power your home or business without additional components.
The batteries inside EVs also are DC. A DC charger delivers the current directly to the EV’s battery. A DC charger can charge an EV at a rate higher than the battery’s capacity. A 20 kW DC charger, for example, can put 20 kW of power per hour into an EV with a 3.6 kW battery even though the charger’s power rating is higher.
Therefore, a DC charger typically charges at a faster rate.
Different EV’s have different rates of power so it is important to know your vehicle’s parameters prior to purchasing any charger.
At Metro, we offer a Public DC charging station. We also have specially ordered portable DC chargers. If interested, please give us a call to discuss at 866-892-1285.