There's been an EU funded research project that did some projections on the electricity needed for e-fuels. See the graphic on page 44: https://www.fch.europa.eu/sites/default/files/FCH%20Docs/202...

For pure e-fuels they project 32 PWh. That is, to put it in perspective, more than the total world electricity production today. You'll want to use every technology available to do this in a more efficient way - batteries for very short ranges, hydrogen for mid ranges, e-fuels only for long range where nothing else works. It'll still be very challenging and likely the current growth projections of the aviation industry will be seen as unrealistic fantasies at some point in the future.