From Hempstead back to the car it was all tail wind allowing me to average 23 mph for the second half of the ride with a bit less wattage!
I did learn that when the battery starts to go low on the iBike Power Meter, it starts to produce some sporadic readings. From mile 30 on, it would periodically think I was climbing a steep hill. According the manual, that is "normal" when the voltage from the battery gets too low. I now know how to verify before the ride the battery voltage to avoid this issue in the future.
Train safe!
-Coach Grant