Alternator Scamp /6

Alright the needle no longer shoots toward the 40+ mark now, but it stays on the mid point even after engine is off ( I assume that is not normal). So I still need to dig around a little Im goning to read into the manuel that 67Dart273 provided and maybe this will sovle my issue.
Thanks
Van Leer

centered with engine off is normal unless you have engine off and headlights or something with a load turned on