If my eb3a runs out of battery will it restart itself.

I’m running a 200 W solar panel but overnight. If I run out of power button we typically use very little overnight 20 to 30 watts per hour.
But if I was to run out would it automatically restart and turn on the AC or dc again? Or Would it restart but then have to manually turn it on again?

If you connect the solar panel, the machine will be activated automatically when you have PV input.
If only AC (grid) is connected, the machine will need to be manually turned back on after the power is depleted.

You will have to manually turn the AC power output back on after a re-start.