Hi Lars-ss:

___You are mixing some items up … While being propelled in EV mode, the dyno is registering distance traveled but the bag is not receiving any CO2 because the ICE is off. When the ICE starts back up (on fuel) it charges the pack back up to ~ the same condition it was in when the test was started. This charge comes from the excess fuel being consumed to both propel the Prius II and charge its pack back up. The charge to drive the Prius II in EV mode is not free as it appears you might be thinking.

___Good Luck

___Wayne R. Gerdes
___Waynegerdes@earthlink.net