Well so I went through a bit of testing the otherday, Used a multimeter and checked the drain on the battery and the fuses, When the engine is off it is a solid 12.7 V
Engine On No Load: 14.4
Radio On: 14.3
Lights on: 13.7
Lights and radio on: 13.4
There is no voltage shortage, I have a 100 Atlternator in there.. (sigh) this is bloody frustrating.