Borrowed a friends DashDaq with Volt OBD PIDs. Took a route home that gives me a diverse set of driving conditions so I could see the regen performance.
Average Results... 20% Energy recovered from regenerative braking
Which adds about 6 to 8 electric miles to a commute, saving about 2 gallons of gas each week, if you charge both ways. If I did my calculations right???
Snapshot of data below....
DashDaq data on the left. Calculated data on the right.