Meralco rates are near record levels, so guessing what an appliance costs is an expensive habit. Here is the arithmetic for a evaporative air cooler at the current rate, with every assumption written down so you can change it.
A evaporative air cooler draws about 150 W. At the current Meralco rate of ₱14.7833 per kWh that is ₱2.22 per hour. Used 8 hours a day it costs ₱17.74 daily and about ₱532.20 a month.
Calculate it for your own air cooler (evaporative)
Change any box. The result updates as you type.
Planning estimate. The rate box is prefilled with a regional average; the figure on your own bill is the one that matters. Power is draw while running, not while switched on.
| Usage | kWh | Cost |
|---|---|---|
| Per hour | 0.15 | ₱2.22 |
| Per day at 8 hours | 1.20 | ₱17.74 |
| Per 30-day month | 36.00 | ₱532.20 |
| Per year | 438.00 | ₱6,475 |
What drives the number
Air coolers use a fraction of what aircon does but work by adding moisture to the air, which is far less effective in Philippine humidity than in dry climates.Only three things decide the cost: the wattage, the hours, and the rate. Wattage is fixed by the unit you own and is printed on the nameplate. The rate is fixed by Meralco and changes monthly. Hours is the only one under your control, which is why the table below is the useful one.
Cost by hours used per day
| Hours/day | kWh/day | Per day | Per month |
|---|---|---|---|
| 1 | 0.15 | ₱2.22 | ₱66.52 |
| 2 | 0.30 | ₱4.43 | ₱133.05 |
| 4 | 0.60 | ₱8.87 | ₱266.10 |
| 6 | 0.90 | ₱13.30 | ₱399.15 |
| 8 | 1.20 | ₱17.74 | ₱532.20 |
| 10 | 1.50 | ₱22.17 | ₱665.25 |
| 12 | 1.80 | ₱26.61 | ₱798.30 |
| 24 | 3.60 | ₱53.22 | ₱1,597 |
Why fans stay cheap even at record Meralco rates
A fan does not cool air. It moves air across skin so sweat evaporates faster, which makes a person feel cooler without changing the room temperature at all. That is why running one in an empty room does nothing except add cost.
Because the motor is small, the cost stays negligible even as the Meralco rate climbs. The important number is not what the fan costs but what it saves: sitting comfortably at 26 degrees instead of 24 with the aircon on is worth far more than the fan will ever cost.
How to spend less on it
- Switch it off when you leave the room. A fan cools people, not spaces.
- Use it alongside aircon and raise the aircon setting by two degrees.
- Clean the blades. Dust builds up fast and unbalanced blades make the motor work harder.
Reading this against your actual Meralco bill
Your bill shows total kWh consumed and the amount charged. Divide the total by the kWh and you get your real effective rate, which will differ from the headline figure because of lifeline discounts, senior citizen discounts and the refunds Meralco is currently passing back.
Households consuming 100 kWh or less qualify automatically for the lifeline rate, which is substantially cheaper and applied without registration. If that is you, every figure on this page is an overestimate. Put your own effective rate into the calculator above and the numbers will correct themselves.
How the Meralco rate has moved this year
The same evaporative air cooler cost noticeably less in January than it does now, with nobody changing how they use it. The generation charge is repriced every month against fuel costs, the peso-dollar rate and the wholesale spot market, so these figures move with it.
| Month | Rate per kWh | Bill at 200 kWh |
|---|---|---|
| January 2026 | ₱12.9508 | ₱2,590 |
| February 2026 | ₱13.1734 | ₱2,635 |
| March 2026 | ₱13.8161 | ₱2,763 |
| April 2026 | ₱14.3496 | ₱2,870 |
| May 2026 | ₱14.3345 | ₱2,867 |
| June 2026 | ₱14.4833 | ₱2,897 |
| July 2026 | ₱14.8261 | ₱2,965 |
| August 2026 | ₱14.7833 | ₱2,957 |
Compared with the alternatives
| Appliance | Watts | Per hour | Per month |
|---|---|---|---|
| Electric Fan | 60 W | ₱0.89 | ₱266.10 |
| Ceiling Fan | 60 W | ₱0.89 | ₱266.10 |
| Exhaust Fan | 35 W | ₱0.52 | ₱62.09 |
Running a evaporative air cooler on solar
The Philippines averages roughly 4.8 peak sun hours a day, well above most of Europe or the northern United States. That, plus a grid rate near fifteen pesos, is why rooftop solar pays back faster here than international figures suggest, often in three to five years in Meralco territory.
| Panel size | Output per day | Panels needed |
|---|---|---|
| 400 W | 1.54 kWh | 1 |
| 450 W | 1.73 kWh | 1 |
| 550 W | 2.11 kWh | 1 |
| 600 W | 2.30 kWh | 1 |
Panels only produce in daylight. If the evaporative air cooler runs at night, that energy has to come from a battery, and batteries remain the expensive part of a Philippine solar quote. Net metering credits exports at the generation charge rather than the full retail rate, so using your own production during the day is worth considerably more than selling it back. Financing options including the SSS Energy Sustainability Loan are worth reading before you commit.