An inverter air conditioner should be the first choice if your budget allows it. An inverter compressor saves a ton of energy, reduces operating costs, and can perform incremental cooling as desired. A non-inverter compressor runs at maximum power most of the time and can inflict heavy operating costs on the consumer. Inverter air conditioner doesn't mean it runs or can run on the inverter. It is a simple technique to restrict fan and motor operation as per the current need of the user.