Reduce the load on your busy air conditioner with plantings that shade the compressor units. They should be on the north
side of your house, which is mostly shady. This way it is more so. You can enhance the effect by running misters at times in the environment, making it a distinct microclimate with lots of cool moist air.
There is a water-cooled air conditioning condenser that uses evaporated water, similar to a swamp cooler. See the Partnership for Advanced Technology in Housing
website for a description. “The efficiency, depending a little bit on particular conditions, might be nearly twice as high,” says Bob Boehm, Director of UNLV’s Center for Energy Research. “That means your bill will be nearly one-half.”