I have exactly the same problem on 1.7 GHz Intel Core i7 MacBook Air, El Capitan 10.11.6 (15G1004)
I have 100% power at 9pm and 3% remaining on the next morning. It is so bad that when I put the macbook into its cushion sleeve, it cooks itself and the fan runs the battery down even quicker.
Started a few weeks ago. Been through all the threads, reset the pm settings to default, tried to set them on the terminal to put the thing into hibernation but to no avail.
No peripherals. Happens with WiFi turned off also.
syslog | grep -i "Wake reason"
Sep 23 11:46:17 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:46:50 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:47:52 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:48:27 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:49:02 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:49:35 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:50:08 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:51:05 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:51:41 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
Sep 23 11:52:17 Swidis-MacBook-Air kernel[0] <Notice>: Wake reason: EC.DarkPME (Maintenance)
There are no other wake events, this is what fills pages of syslog | grep -i "Wake reason" output
Current settings are:
Active Profiles:
Battery Power -1*
AC Power -1
Currently in use:
standbydelay 10
standby 1
halfdim 1
hibernatefile /var/vm/sleepimage
powernap 0
disksleep 10
sleep 1
autopoweroffdelay 14400
hibernatemode 25
autopoweroff 0
ttyskeepawake 1
displaysleep 2
acwake 0
lidwake 1
Anybody here who knows what can trigger Wake reason: EC.DarkPME (Maintenance) every ~60 sec?