You’re correct El Corazon, to point out the power usage. And this is where small telescope mounted PC’s can vary quite a bit. The Fitlet2 uses 7W (Linux, not sure about windows, might be more intensive) which is more than a RPi, which is probably closer to 2 or 3 W. But in the total scheme of things, 7W is very little. By comparison, putting the ASI1600 cooling on 75% takes 14W, or turn on one dew heater for a 130mm scope takes 10W, and the mount takes 13W. For my setup, I use about 40W, of which I could save 3 or 4 by going with a RPi. I am using a 400Wh battery, which lasts me 10h of observation time. Unfortunately there are few nights where I need the full battery.