Good point and no... Hooked up initially for about 10 hours yet the car during that time was sleeping and seemingly behaving normally. Something is waking and draining after 24 hours and I wondered if this might be a symptom people have encountered thus narrowing the suspects list. Going to pull the webasto plug and fuse, radio fuses, aux fan fuse, rear wiper fuse and hopefully boot lid soft close fuse if I can find it and see if there is still a drain after 48 hours