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Myths Regarding Electric Vehicles- Myth #7 Charging Time

(Joseph Gottlieb, CTO, Thursday, October 17, 2019)

There are many myths regarding electric vehicles (EVs), and we are tackling the more prevalent of them, including the concern that EVs take too long to charge to be a realistic substitute for a gas-powered vehicle. The reality is that how long any battery will take to recharge depends on a number of factors, but all can be accomplished in a manageable way such as charging overnight or during the workday. A typical electric car with a 60kWh battery takes about 8 hours to charge, but that is from empty to full. Most drivers charge before the battery is empty. And for many EVs, one hundred miles of range can be added in around a half an hour using a 50kW rapid chargers. Another point- almost all EVs can rapid charge, while must plug-in hybrid electric cars cannot.

All EVs have a standard 120v charging cord that you can plug-in in a standard plug in your home. Many houses have 240v available for electric clothes dryers, and support adding a dedicated 240v charging station to charge more quickly. Most drivers charge their EVs overnight in their garage. Charging times depend on size of battery pack and the power acceptance rates. You can download this chart for very specific information for each EV model: https://www.clippercreek.com/wp-content/uploads/2019/05/Time-to-Charge-Chart-20190509_Final_low-res.pdf.

Examples for some popular EV models:

Tesla Model 3: 310-mile range

  • Home Charging:Get about 36 miles of charge in 12 hrs with a domestic outlet, or 0-100% charge in about 9.5 hrs with the Tesla Wall Connector.
  • Public Charging:At a rate of 25 miles for every hr of charge, DC fast chargers provide 0-80% charge in about 10 hrs.

Chevrolet Bolt EV: 238-mile range

  • Home Charging:Get about 48 miles of charge in 12 hrs with a domestic outlet, and 0-100% charge in about 9.5 hrs with the available 240V 32-amp charger.
  • Public Charging:Get 90 miles of charge in about 30 minutes with DC fast charging (or 0-80% in a little over 2 hrs.

Nissan LEAF: 150-mile range

  • Home Charging:Get 0-100% charge in 7.5 hrs with a Nissan home charger, or use Nissan LEAF Trickle Charging if you only have access to a domestic outlet.
  • Public Charging:Get 90 miles charge in about 30 minutes with a normal public charging port, or use the Nissan Quick Charge port to get 0-80% charge in about 40 minutes.

Plus, the average American only drives 40 miles each day, so you are not depleting the battery on a daily basis. For most drivers, the EV is only going to need a short recharge time to be fully charged again. That 40 miles might take four hours to drive in Los Angeles, but that is beside the point!

Utilizing energy storage in EV charging infrastructure is one of our specialties. As renewable sources become a larger percentage of the electrical power consumed in fleet EV chargers, batteries are needed to buffer the intermittent supply and demand. Power converters enable batteries to be used by converting power from AC to DC to charge batteries and from DC to AC to use the energy stored in batteries. Every energy storage system (ESS) depending on type of batteries, operates at different voltage ranges and charge/discharge rates. Our power converters are a core part of an ESS and are tuned to optimize each ESS. Learn more at www.RhombusEnergySolutions.com.

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