Wireless charging could cut EV fleet costs in half – Green Fleet


Detached from the cord, vehicles have more time to charge and can do so at lower power, such as at the dock loading, at the depot being cleaned or prepared, or when parked.

Photo: Witricité

WiTricity, a company that provides wireless charging systems, on September 22 released the results of a study that assessed the relative total cost of ownership (TCO) of adopting and operating a fleet of electric vehicles (EVs) for last mile parcel delivery when these vehicles were equipped with wireless charging instead of plug-in charging.

The study found that by using wireless charging technology, last mile electric vehicle fleets save up to 50% of the total cost of ownership.

In a standard plug-in model, the EVs are taken out of service for recharging: a driver moves the EV to the charger, plugs in, and there the EV stays until it is sufficiently charged. In contrast, wireless charging allows fleets to adapt their charging model to existing business workflows by bringing the charge to electric vehicles where they are: at the dock being charged, at the depot being cleaned or preparation, or parked. Detached from the cord, vehicles have more time to recharge and can do so with less power.

The result: to reduce costs by flattening the “demand charge” curve, the compensation paid to the utility to keep the grid with sufficient capacity to supply a customer’s needs during peak periods. Since electric utility charges are one of the top three components of an EV’s lifetime cost (the other two are kilometers driven and the purchase price of the vehicle), the result is a reduction of the overall total cost of ownership of switching to electricity.

“With businesses and government agencies upgrading their last mile fleets to be electric – from delivery vans to postal trucks – there are obvious and major benefits to being able to charge them wirelessly,” said Alex Gruzen, CEO of WiTricity. “Our analysis shows that WiTricity’s technology introduces great flexibility with significantly lower costs.

WiTricity compared using a 50kW plug-in load to 24kW wireless charging with the fleet running two 8-hour shifts, leaving four hours per shift for charging and depositing operations. The study found that wireless charging instead of plug-in charging:

  • Double the duration of charging operations. Indeed, wireless charging stations can be installed at key locations in the depot – loading docks, cleaning areas, parking areas – so that vehicles can recharge in parallel with other depot operations simply by logging in. guarantor as they normally would.
  • Halves peak electrical demand for depot. Spreading the load load over more time means that utility demand loads are lower. This also has the added benefit of reducing the overall strain on the power grid.
  • Decreases exposure to back-up power generation infrastructure and operating costs. Similar to peak load calculations for power demand charges, the demand for electricity from backup power sources such as micro-turbines or traditional diesel generators is also reduced.
  • Reduces labor and maintenance costs. With wireless charging, no human intervention is required to plug in and unplug, increasing battery life and reducing labor costs. Plus, wireless charging requires very little maintenance as there are no serviceable parts, active cooling, or mechanical connectors that wear out or need to be replaced.

WiTricity Information: witricity.com / Study information here.

Originally posted on Loaded Fleet

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