BMW i3 At-home Charging

BMW i3 At-home Charging

Researchers from the University of Michigan Transportation Research Institute (UMTRI), Brandon Schoettle and Dr. Michael Sivak, surveyed consumers about PHEVs and at-home charging.

A total of 542 people completed the survey, a majority of which were not EV owners. Rather, this was largely a sample of the general public (uneducated about EV technology), sharing their speculations and opinions on EV charging. About 17% were said to have had some type of EV or charging experience. Schoettle explained:

Many Plug-In Vehicle Owners Opt For A 240V Charging Station At Home

Many Plug-In Vehicle Owners Opt For A 240V Charging Station At Home

"We noticed that people tend to prefer the things that give them the most control, rather than the most convenience. For example, respondents seemed to think that a traditional cable was the best way to recharge, even though inductive wireless charging could enable a self-fueling vehicle. A person wouldn’t be required."

Takeaways from the report:

  • To manage the costs and electricity demand at home, 73% of people would elect optimized charging vs. on-demand charging (optimized charging allows the system to manage and plan vehicle charging, for example, charging at off-peak times).
  • 65% said they’d prefer to prioritize renewable energy sources rather than settle for standard optimized charging.
  • Nearly all—84%—would like to be able to “reverse charge,” or feed electricity from their vehicle back to the public grid in exchange for reduced rates or other compensation. Reverse charging could also help reduce power plants’ load during peak times.
The study showed that current regulatory standards would not necessarily support the requests of the consumers surveyed. This is obviously seen by the researchers as problematic for future mass adoption of PHEVs. The Consumer Preferences for the Charging of Plug-In Electric Vehicles states:

"A system that operates correctly, yet fails to satisfy the preferences and expectations of the PEV users, may end up limiting future acceptance of such systems and PEVs in general. This might be especially applicable to consumers who may already be reluctant to adopt a relatively new technology like PEVs. Furthermore, potential future uses of PEVs to enable self-fueling of self-driving vehicles may be problematic or unfeasible without the support for scenarios such as plug-and-charge and eVehicle roaming."

Source: Green Car Congress