http://www.coolgreengadgets.com/2008/01/06/solar-powered-ac-is-genius/

One of the biggest Money and energy wasters finally got solar!SolCool Millenia has developed an ingenious air conditioner that uses solar power to power the A/C.The sunnier (or hotter) it gets, the more cooling power it has…thus, when the sun rises you have more cooling power . But just in case, the SolCool Millenia A/C is equipped with a 24 hour battery for those needing it at night.