HOW WERE THE MECHA POWERED IN THE ORIGINAL ANIME?
Usually, the mecha were supposed to be fusion-powered. The messy issue of how the heat gets converted into electricity or motive power (in both the original anime and Robotech) is neatly ducked. In Mospeada (New Generation) the fuel cells were Hydrogen and Oxygen. In some scenes, ‘HOH’ can be seen written on the cells.