A bar manager in Southeast Asia writes: the machine is rated at 500 kg per day, yet by ten in the evening we are buying bagged ice. Is the machine too small? Usually not. The question that should have been asked at the quotation stage is a storage question: how much ice must be available at the start of service, and how fast does the machine refill the bin while service is running? Production and storage are two different numbers, and a purchase that matches only the first will fail on a busy Saturday.

The principle: production is continuous, demand is not

A 500 kg/24h machine does not produce 500 kg the moment you switch it on. It freezes in batches — our mid-range cube machines publish 15 to 20 minutes per cycle — and accumulates output over the whole day, averaging a little over 20 kg per hour. A cocktail bar, by contrast, may draw 60 or 80 kg in a single busy hour. The bin is the buffer that converts a steady trickle into a burst, and its capacity, not the compressor, decides whether the evening ends in ice or in a phone call.

The same arithmetic explains why two sites with identical machines behave differently: one fills the bin overnight and starts service at 100 percent, the other starts at 40 percent because the previous evening emptied it and the machine only began refilling at six in the morning.

What storage our models actually offer

A worked example

A 300-seat restaurant with a terrace serves two turns and uses, by its own estimate, 0.4 kg of ice per cover for soft drinks, water and desserts. Daily demand is 300 x 2 x 0.4 = 240 kg. Add 10 percent for staff use, cleaning and waste: 264 kg. Add a seasonal factor for the terrace: 300 kg. The machine must therefore be rated above 300 kg at site conditions — which is why the 200–500 kg/24h series with a 250 kg bin is the natural starting point, derated for a hot kitchen.

Now the peak. If 40 percent of the day's ice leaves the bin between 19:00 and 22:00, that is 120 kg in three hours, while the machine adds perhaps 60 kg in the same window. The bin must therefore hold at least the difference plus a margin, which is exactly what the 250 kg bin provides. A smaller bin paired with the same machine would run dry at the busiest moment despite adequate daily production.

Three rules of thumb to check your sizing

1. Bin capacity at least 1.5 times the peak-period draw. This absorbs the ice in transit, melt and the machine's own catch-up.
2. Bin capacity at least 40 percent of daily production. Below that, the machine cannot recover overnight.
3. Rated output at least 1.1 times daily demand, measured at your site conditions. In a hot room, apply the derating, not the catalogue figure.

Details that decide whether the plan works

• Usable capacity is lower than nominal. Ice mounds, so the top corners of a bin are never full. Plan on roughly 85 percent of the published figure.
• Melt loss. A well-sealed bin loses a few percent of its contents a day; a damaged lid or a bin beside an oven loses far more.
• Location of the bin. A bin on another floor is effectively a smaller bin, because nobody carries ice mid-service.
• Two outlets, one machine? A second small machine near the second bar is often better than a long carry.
• Ice size and serving speed. Standard 22 x 22 x 22 mm cubes scoop and pour well; very thick cubes slow service and increase energy per kilogram.

FAQ

Can I add a bigger bin later? On modular machines, yes; on under-counter units the bin is integral. Decide before you buy.

Is a full bin wasteful? No — a full bin is the buffer that makes peak service possible. Wasting ice is a sign of oversizing production, not of filling the bin.

Do I need a second machine for banquets? If banquets are occasional, a larger bin is cheaper. If they are weekly, a second head is easier to justify.

Does a larger bin change the electricity bill? Marginally, through better insulation and fewer compressor starts, but the main effect is service reliability, not energy.

Send us your covers, drinks mix, service hours and the space available for a bin, and we will size both the machine and the storage against your peak rather than your average. See 500–1000 kg/24h models with large bins, the 60 kg unit with a 20 kg bin, or the 200–500 kg/24h unit with a 250 kg bin, or request a peak-load sizing sheet.