Inverter Technology refers to the compressor within the outdoor component of your split system air conditioner. The two most common types of compressors are the fixed speed (non-inverter) compressor which are in the majority of older style R22 split systems. The fixed speed compressor will run at 100% of its capacity and will stop and start automatically to try and maintain the desired temperature constantly running at full load. An inverter compressor will vary its speed in order to maintain a consistent temperature while cutting your power bill down.