I have empty fuel tanks, 1,500 units of ore in a tank. 4x Gigantor solar panels extended, and 4 of the small, passive radiators. I noticed that the radiators did not pick up a glow. (And I should mention that they were on a docked lander whereas the ISRU was on the rover docked to the lander. Nevertheless, the ISRU status said temp OK, 100% efficiiency.)
Small ISRU runs quickly and at 100% efficiency at optimal temperature. I see that I *am* getting fuel converted but from 1,500 units of ore I only got about 20 units of fuel.
There was a Kerbonaut sitting on a chair on the rover but I understand the presence or not of a Kerbonaut does not effect ISRU performance.
This is KSP 1.0.5. So what gives? I expected to get 3,000 units of fuel from that 1,500 units of ore...
Thanks for any assistance and enjoy your Holidays!