Electric Vehicle charging, push your power demand: plug-in off-peak
February 3, 2014
February 3, 2014
Many electricity providers have started implementing time of use rates for billing. These rates provide an incentive for consumers to shift their electrical demand off-peak. Homeowners can take advantage of this by moving their power hungry tasks (such as washing and drying clothes) to the evening, instead of the middle of the day. Fleets can take advantage of these rates by shifting their electric vehicle charging off-peak.
In our recent Driver Behavior E-Book, we looked at the difference between just putting guidelines in place and monitoring and enforcing those guidelines.
One of our fleet partners set a goal to reach 80-90% off peak charging. Driver surveys indicated that they were hitting that goal. However after looking at their charging data, we found only 49% of their charging was truly off-peak.
The graph above shows this vehicle’s charging profile. The profile shows the time of day in a 24 hour clock along the bottom, with each bar showing the amount of energy that was used for charging at that time of day. Inside our online web portal, we allow fleets to set a target time period for charging, and goals for the amount of charging within this target period. Check out other vehicle’s charging profiles by using our demo account.
This fleet chose a target time period between 6 pm and 7 am shown in blue, however without feedback, the most frequent time for charging was 4-5 pm.
With this feedback, the fleet took immediate action, passing these results and implementing new guidelines to drivers of the vehicle. The fleet also began programming their vehicle’s charge times.
The change in their charging profile was startling. The feedback was used to manage the vehicle’s charging going forward, shifting 40% of their charging energy to their off-peak goal time.
Most importantly, this change didn’t prevent the fleet from fully using the vehicle. The vehicle’s utilization throughout the day remained the same, getting roughly the same electric distance traveled each day.
You can learn more on how driver behavior and fleet choices affects the power consumption of electric vehicles within the driver behavior e-book. The e-book covers steps to improve driver behavior, and provides actionable guidelines for fleets to set goals, and manage fuel costs.