An OverTechnology which redirects excess power generated by a vehicle engine into the specially designed armored hull of the vehicle, resulting in a significant increase in armor strength. Early variable fighters relied upon overtuned conventional engines producing enough power to increase armor strength to that comparable to a tank. Later variable fighters utilized similar energy converting armor, but featured far more powerful thermonuclear reaction engines. In 2059, the Vajra appeared utilizing a form of Energy Converting Armor so powerful it was nearly invulnerable to all but the heaviest of weapons. Although first mentioned as official fact in Macross Zero (2002), creator Shoji Kawamori publicly described the general technology of energy converting armor before Macross Zero and actually conceived it longer before.