yep sorry, of course its EU.
yeah... they where all connected to a MFSU. But i got it now. If I put any storageblock right behind the generators they all have the normal EU output.
Its it's definitely related with the distance to the next storageblock. Kinda weird imho.
But yeah, just set up a small batbox 1-2 blocks away from the generators and everything is fine
Problem solved (for me)
thx for this hint