Sleep Cool, Save More: Why do Midea air conditioners have 5 ticks ratings? Its unique ability to be extremely low cost at $0.20 per hour for 8 hours a night makes it have Xtreme SavE status. It achieves Xtreme SavE status because of Midea's exclusive Inverter Quattro compressor which is a breakthrough in energy-saving technology. It also has an ingenious alpha chip that sends signals to the compressor for better stabilization. Both these features make it the best energy-saving unit in the market.