The three numbers you need
- Daily energy in kWh per 24 h: from a BEE label (divide the yearly figure by 365), the supplier's test data, or your own meter.
- Your tariff in rupees per kWh: take it from your electricity bill, including fixed charges spread per unit if you want a fuller picture.
- Days of operation: most visi coolers run all 365 days, even when the shop is shut.
The calculation
Yearly running cost (₹) = kWh per 24 h × 365 × tariff (₹ per kWh). Monthly cost is roughly the yearly figure divided by 12. Commercial tariffs vary by state, distribution company and slab, so use your own bill rather than a national average.
| Daily use (kWh/24 h) | Per month (₹) | Per year (₹) |
|---|---|---|
| 2.5 | about 610 | 7,300 |
| 4.0 | about 970 | 11,680 |
| 6.0 | about 1,460 | 17,520 |
| 8.0 | about 1,950 | 23,360 |
Comparing two coolers over their life
Suppose cooler A uses 4 kWh per day and cooler B, with better glass, LED lights and EC fans, uses 2.5 kWh per day in the same conditions. At the assumed ₹8 per kWh, the difference is 1.5 × 365 × 8, about ₹4,380 a year. Over a working life of several years that adds up, and it is the figure to set against any difference in purchase price.
Make sure both figures were measured under the same conditions. A saving that exists only because one supplier tested at a lower room temperature is not a saving.
What changes your real running cost
- Sun and heat: a cooler in a sunny shop front or a non-AC shop in summer runs far longer.
- Customer traffic: each door opening lets warm air in, and busy evenings add up.
- Restocking with warm crates: pulling down warm bottles is one of the biggest loads on a beverage cooler.
- Set point: setting colder than you need costs energy; most drinks sell well at a few degrees above freezing.
- Dirty condenser coil: dust raises condensing pressure and run time.
- Lights and anti-fog heaters left on full when the shop is closed.
Measuring your own cooler instead of guessing
If the cooler is already in the shop, measure it. Plug it into a reliable plug-in energy meter and leave it for at least a week, covering a weekend and a restocking day. Divide the kWh reading by the number of days to get your real daily figure, then use the same formula. This figure includes your own sun, heat, customer traffic and restocking habits, so it is a far better basis for decisions than any brochure.
Repeat the measurement in a cooler month and in peak summer. The difference shows how much the season drives your bill, and it tells you whether shading the shop front or moving the cooler is worth the effort.
Ways to cut the running cost
Most savings come from habits rather than hardware. Restock during quiet hours so the cooler has time to recover before the evening rush. Keep the cooler out of direct sun and away from other heat sources. Clean the condenser every few weeks in dusty areas. Use an eco or night mode if the controller has one. When it is time to replace an old cooler, choose efficient components and ask for measured kWh, not just wattage.
Frequently asked questions
- Why does my visi cooler cost more to run in summer?
- The cooler has to remove more heat when the shop is hotter, customers open it more often and warm stock comes in more frequently. All three increase compressor run time, so summer bills are usually higher.
- Does a bigger visi cooler always cost more to run?
- A bigger cooler usually uses more kWh per day, but it may cost less per bottle chilled. Size the cooler to the stock you actually sell; a large cooler that stands half empty spends energy cooling air and empty shelves.
- Should I include fixed charges in the tariff?
- For comparing two coolers, use the energy charge per kWh, because fixed charges do not change with the cooler you choose. For budgeting your total bill, include everything.
