I have 70 miles on my new Pace 500. I don't use the PAS much. It had full battery, probably 90%. Today, while riding, I needed a little assistance, and put it in PAS 1, and nothing happened. Tried PAS 2, and nothing. Then tried the throttle, and nothing. Fooling around with the controls, I see ER message. Turned it off, turned power off. waited a while, and tried again. Although I still got the error message, and PAS didn't work, the throttle did. And after that, it went back to normal. What could have caused the power outage? I was quite far away...I don't know how I would have made it home.