Pedal to the metal, losses charge.
 

I have an older model ParCar, after I fully charge it and take it for a ride the voltage indicator goes from fully charged(green) all the way down to red when I have my foot all the way down on the pedal. After I lift my foot it will back to green. What seems to be the problem and how much will it cost to fix it? Thank You!

Battery gauge
 

Even If the gauge is diving during exceleration it may be one or more batteries failing. ParCar has had problems with there digital gauges, and this could be the case.
Without going through proper testing it is hard to conclude what your problem is. We will be glad to give you a complete test at our shop for a modest fee.:gc:

Thank You Frank, I had my husband read this and he will be giving you a call.