Can it stay on all the time?
9:41192.168.1.107 

Yes. The old site’s FAQ: Yes. Day and night. You can turn it off if you want to, but there is no need. Its designed to run 24/7 x 365 on a a single watt of power. Two settings make always-on comfortable: Nighttime quiet hours dim it between two times, and a mid-range Brightness keeps the panel cool, as the settings page advises. See Nighttime quiet hours and Brightness.