Battery Storage, Energy & Rate of Charge?

Charging kW kWh


Dana Sinno
Published on April 28, 2023
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How do I know how much energy my EV battery can store and what is my max rate of charge? 

Starting with kWh & kW…

kWh (kilowatt-hour) is a unit of energy that measures how much energy your electric vehicle’s battery can store. The higher the number of kWh, the more energy your battery can hold, which means you can travel further before needing to recharge.

kW (kilowatt) is a unit of power that measures how fast your electric vehicle can accept charge. The higher the number of kW, the faster your vehicle can charge.

A DC Fast charger has a 350 kW max power output during a session. (Level 3)
If your EV has a lower charging capacity, it can’t accept a 350 kW charge.  It will provide what your EV can handle and it will be SLOWER!
For example, looking up the specs on a 2023 Kia EV6 Wind (RWD) with a battery energy of 77.4 kWh means that it can store up to 77.4 kilowatt-hours of energy.  It can charge at a fast rate of up to 350 kW using a DC fast charger. This means that it can charge from 10% to 80% in approximately 18 minutes.

Check times for charging with a standard Level 1 home outlet, a 220 outlet and public stations. 

You gotta know what you’re working with! 

Go electric ✌🏼


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