Famous chef El Pante fries egg on a 24V ebay induction heater:
ebay induction heater board with self made spiral coil, ceramic pan with metal bottom for induction cooking. Had to check not burning the coil every now and then. Pushed it all the way to 20.4 ampere at 23.4 V. Should bake eggs on a 24 V battery. This site explain the slow baking method:
Tastes quite good actually, cleaned up the stuff I spilled. Time about 5 minutes at average maybe 16A, so consumed about 16/12 Ah, or 1.33 Ah, at 23.5 V makes 31 Wh, not bad.