Inverter vs Non Inverter AC
The short answer: an inverter AC costs a little more to buy but much less to run, and in Pakistan almost every new AC is now an inverter.
Updated 11 November 2026
How they work
A non inverter AC runs its compressor at full speed, switches off when the room is cool, then switches back on at full power. An inverter AC slows the compressor down and keeps it running gently, so the temperature stays steady.
Electricity consumption
Because it avoids repeated full-power starts, an inverter AC typically uses 30 to 50% less electricity over a summer than a non inverter AC of the same ton. For a 1.5 ton AC running 8 to 10 hours a day, that is a big difference on a WAPDA or K-Electric bill. See AC units per hour.
Cooling, noise and voltage
- Inverter: steady temperature, quieter, works better at low voltage, many also heat.
- Non inverter: cools fast at full blast, but the room swings warm and cold.
On UPS or solar, an inverter AC is far easier to run.
Verdict
Buy an inverter AC. New non inverter ACs are now rare, and even the cheapest inverter ACs pay back the difference through lower bills.
Voltage, stabilizer and compressor stops
An inverter compressor does not stop and start all day like an old AC. It slows down once the room reaches the set temperature and keeps running gently. It may stop for a short while only if the room is already colder than the setting.
Most inverters accept a wide voltage range, so a separate stabilizer is usually not needed. Models such as Midea 18HRFN (Xtreme) 1.5 Ton Inverter AC and Gree GS-18AITH24 1.5 Ton Inverter AC list a low-voltage start.