The front end has been adjusted down accordingly. Someday it would be nice to get the car into the Porsche dealer to have the ride height set and the wheels aligned. Road tests on my standard hilly loop gave 9.3 miles. Before the 120 volt upgrade, a test on this loop yielded 7.1 miles. The range should improve as the batteries get broken in and the weather warms up.
Performance is much improved, especially on the hills.
The shift point is up to around 4000 rpm vs. about 3000 rpm before the upgrade. This is caused by charging current leaking from the battery circuit to the car frame. For safety, the frame connects to the house electrical ground via the charger's AC power cable. It wasn't possible to clear the problem by cleaning the batteries. Voltage tests showed that the main leakage path was in the front battery box.