Interesting comparison:
That's 1.8 minutes at 700W to toast bread = .021 kWh
Bryan Allen, 2 hours 49 minutes at 190W = .535 kWh
Great performances all but, giving Allen his due, wiki notes that the winged Albatross required 300W in calm air. Also, climbing to an altitude to get over the turbulence may have had him peaking at over 500. Moreover, there apparently was a hydration issue...