A new solar-powered air conditioner has been introduced by SPP (Solar Panels Plus). It is high Seasonal Energy Efficiency Rated (SEER) and is called the SplitCool DC18.
The air conditioner runs on a bank of batteries powered by solar panels and can be installed without adding ducts. It would handle each room as a separate zone. It also features a remote compressor, allowing for quiet operation.
Read more about it here.