Here is a good list of processes to populate the monitor: I really like the battery graph and the list of apps using which GPU. The amount of Apps that use App Nap is relatively low right now but I expect that to rise and perhaps become a requirement for future App Store apps. I do not know what the new Energy Impact is in units. What is this number and what does it mean? As of this writing, Kerbal Space Program is causing an Energy Impact of 179.9. Are 179.9 baby seals getting clubbed per second? KSP is currently using about 45% CPU. I really can't get a grasp at what the unit of measurement is. I have a 45W CPU + a 30W GPU and both under load can sometimes peak around ~80 watts. Regardless, being without a power supply, the energy tab can be someone's best friend.