I've been busy a while and haven't been able to do much with the car, that and the fact that I've been having -20C degrees outside not making it cozy working outside. After being stationary for 4 weeks (charged it after I got it towed home) it started like a charm, so atleast no draining components doing it. I put a voltmeter to the battery and started it up. It read 13,80V when idle. Then reved it up to 5000rpm without much change in the voltage. Then I turned on headlights, stereo on full, air condition, heater just anything I could think of to drain it. And didn't drop anything worth noting.
Let it stand like that for a little bit on idle and after a short while it started dropping, no change in the rpm but slowly dropped down to 11,5V and the alternator light came on. Reving it up and the alternator light went off but the voltmeter still showed 11,5V without any change.
Turning the engine off and back on after 5 minutes and I could repeat the same thing, removing the components draining power after the voltage had dropped didn't make it go back up again either.
I'm not really able to make too much sense symptoms so was just hoping for the odd chance it was something another had fixed before me. I'm going to run through the wiring and check all plugs between the alternator and the battery, and also try take a look at the groundings. If nothing else work I suppose I have to change the alternator though it seems badly positioned on my car, can't even see it properly from above, if it comes down to removing it, is it a hard job? Will I be able to access it more easily from below?