First of all this lovely screenshot:
I have a probe attached to an astroid, it has the regular drill, plenty of power (retracted for screenshot purposes) and 9 medium thermal control systems. The Convert-O-Tron is not running here.
Why is my drill only getting 1,5% efficiency? The wiki states I need "100kW of cooling" and 9 panels of "12500" (assuming watts here) equals 112.5kW right? So why is my drill not running at 100%? 3 cooling panels are directly attached to the fuel tank the drill is attached to, the other 6 panels are attached to a round fuselage (is it called that way?)
You can also see my other probe attached, that only had 2 small thermal panels but it also stays as 1,5% (so that is why I launched the 2nd ship)