A company called GreenCore Air has released an air conditioner than can be powered by a single 170 watt solar panel.

The GreenCore air conditioning unit can heat and cool a 600 square foot room. It runs on DC power, so there is no need to put an AC inverter between the solar panel and the air conditioner. This eliminates the power losses associated with converting AC to DC.

When the sun is not out the unit runs on the battery bank which is integrated within the unit.

There two version of the air conditioner: a fixed one, and a mobile one that is mounted on wheels.

http://www.metaefficient.com