Inverter aircons cost more to buy but promise lower electric bills. Are the savings real, and how long until the extra price pays for itself? Here’s a simple explanation with an animated drawing and a calculator using your own numbers.
In this article
- How a non-inverter aircon works
- How an inverter aircon works
- How much can an inverter save?
- When is an inverter worth it?
- Tips to get the most savings
- Common myths about inverter aircons
- Total cost of ownership
- Maintenance matters for both types
- How to choose the right inverter aircon
- FAQ
How a non-inverter aircon works
A non-inverter aircon has a compressor with only two states: full power or off. It runs at 100% until the room reaches your set temperature, then turns off. When the room warms up again, it starts again at full power. Each restart draws a burst of current, and the room temperature swings up and down.
How an inverter aircon works
An inverter aircon can change the speed of its compressor. It cools quickly at first, then slows down and keeps running at low power to hold the temperature steady. Avoiding constant start-stop cycles saves energy and keeps the room temperature more even and quieter.
How much can an inverter save?
Savings depend on how many hours you run the aircon, the room size and insulation, and the specific models. Many households see a meaningful reduction, often somewhere around 20% to 50%, especially when the aircon runs long hours every day. If you only use it an hour or two, the savings are smaller and the payback takes longer. Use the calculator with a conservative percentage to be safe.
See the difference: power over time
Inverter savings and payback calculator
When is an inverter worth it?
- Yes if you use the aircon 6 or more hours a day, especially overnight.
- Yes if you want quieter operation and a steadier temperature.
- Maybe not if you use it only rarely; a non-inverter may be cheaper overall.
- Check the energy efficiency label; a better rating means lower running costs.
Tips to get the most savings
- Choose the right size: an aircon that’s too small for the room runs at full power all the time.
- Set 24–25°C and leave it; inverters are most efficient when running steadily.
- Close doors and windows, and use curtains to block afternoon sun.
- Clean filters every 2–4 weeks and schedule regular cleaning.
- Use the timer or sleep mode overnight.
Want to see what your whole household costs? Try our appliance cost calculator.
Common myths about inverter aircons
“Inverters never turn off, so they waste power.”
Running continuously at low speed uses less energy than repeatedly starting at full power. Continuous running is how inverters save.
“Turning the aircon on and off often saves more.”
For inverters, frequent switching forces it to start at high speed again. It’s usually better to set a comfortable temperature and let it run, using the timer when you leave.
“Any inverter is efficient.”
Efficiency still varies between models. Compare the energy efficiency rating and the rated power.
Total cost of ownership
When comparing two aircons, add the purchase price to the electricity cost over the years you plan to use it. For example, an inverter that costs ₱8,000 more but saves ₱800 a month pays back in 10 months, and from then on, every month is pure savings. Over five years, that difference can be tens of thousands of pesos. Our efficient appliance buying guide has a calculator for this kind of comparison.
Maintenance matters for both types
Even the best inverter wastes energy with clogged filters, dirty coils or low refrigerant. Wash the filters regularly and have the unit professionally cleaned about twice a year, more often in dusty areas. A well-maintained non-inverter can beat a neglected inverter.
How to choose the right inverter aircon
- Measure your room. Larger rooms, rooms facing the afternoon sun, and rooms with many people need more capacity.
- Compare rated power. Lower watts for the same cooling capacity means lower bills.
- Check the efficiency label. Higher ratings save more over the years.
- Consider installation. Proper installation and correct piping length affect performance and efficiency.
- Look at warranty and after-sales service. Inverter boards are more complex, so good support matters.
Buying the right size and model, then keeping it clean, gives you the full savings an inverter promises.