Cold Storage With Backup Power in Kochi: What an Outage Costs

Ask a cold store in Kochi whether it has a generator and it will say yes. That is the wrong question — or rather, it is a third of the right one.

Here is the month that prompted this. On 10 September, Kerala was short by roughly 900 MW a day, and KSEB set out restrictions for the evening peak, 6.45 pm to 12.45 am, to be used if power could not be bought on the exchange or if grid frequency fell. Eight days later the cuts almost entirely disappeared for a day, and Onmanorama ran the story as a Friday miracle. Both of those happened in the same fortnight. That volatility, not any single outage, is what your product is stored against.

So here is the honest answer to a question exporters and distributors ask us often: what happens to my stock when the power goes out?

Your first line of defence is the setpoint, not the generator

Before any backup system does anything at all, two things have already decided how much time you have.

The first is how cold the chamber was when the power stopped. For frozen fishery product going to the EU, Regulation (EC) 853/2004 requires −18 °C in all parts of the product, and permits short upward fluctuations of not more than 3 °C in transport. Read that as a budget. A chamber run at −18 °C is already sitting on the legal floor and has nothing to spend. A chamber run at −25 °C has seven degrees of headroom before it is anywhere near a problem. That difference was decided months before the cut, by whoever chose the setting.

The second is how full the chamber is. The product is the thermal store. A densely packed frozen chamber loses temperature far more slowly than a half-empty one, because every pallet is holding the ones beside it cold. This is the part of the answer that sits with you rather than with us: a consolidated block of pallets rides out an interruption better than the same product scattered thinly across three chambers.

The generator question, asked properly

Three questions, not one.

How long is the changeover, and does it need a person? A set that starts on its own is a different asset from one that needs somebody with a key at two in the morning on a Sunday.

How long can it run before it needs fuel, and who brings the fuel? This is the question that gets skipped, and it is the one that matters in August. A tank is a number. A refuelling arrangement is a plan.

Does it carry the refrigeration load, or the building? A great many backup sets are specified for lights, doors and the office. Compressors are a different order of draw. Ask which of the two the set was sized for, and ask it in writing.

The failure that has nothing to do with the grid

Most temperature excursions in cold stores are not power cuts. They are compressors.

A chamber served by a single compressor can have perfect mains supply and still lose its temperature for as long as a spare part takes to reach Kochi. Redundancy inside the plant room is a separate line of defence from the generator outside it, and a facility can easily have one without the other. Ask about both, separately, and do not let a yes to the first stand in for the second.

Why the monsoon matters more than the evening peak

A scheduled peak-hour restriction is a manageable event. You know roughly when it is coming and roughly how long it lasts. The monsoon is not the same animal.

On 3 August this year, heavy rain did around ₹25.43 crore of damage to KSEB's distribution network, with Kannur and Pathanamthitta worst affected and 63,000 consumers still without supply. Restoration in flood-hit areas could only start once the water had receded and it was safe to work. That is not a dip you ride out on a full tank — it is an open-ended outage, on roads that may not cooperate with a fuel tanker.

An evening restriction tests your generator. A monsoon event tests your fuel plan, and then tests it again.

Ask for the record, not the reassurance

Anyone can show you a generator. The question that actually separates facilities is whether they can show you the temperature record for the chamber your product would sit in, across the last interruption they had.

A chamber on 24×7 monitoring produces a curve. If the curve stays flat through a cut, the backup did its job, and you are holding a document you can put in front of a buyer who says the consignment arrived soft. If there is no curve at all, there is no answer — and in a rejection argument the default assumption falls on the last link in the chain that cannot account for itself.

One thing backup power does not do

It does not make the electricity bill go away. Under the current KSERC tariff order, a high-tension consumer pays a demand charge of roughly ₹420 per kVA per month on sanctioned load, billed whether the chamber drew that power or not. Running on diesel does not refund it. It adds to it.

Which is the honest reason backup capacity is under-discussed in this trade. It is expensive to own, expensive to test, and it earns nothing on the days it is not needed. It is still worth paying for, on the arithmetic of one lost consignment against a year of standby cost — but you should expect it to be priced into your rate, and you should be a little suspicious of a quote that is cheap in a state where the grid is this seasonal.

What we run, and what we are not going to claim here

Troveful ColdVault is an FSSAI-registered facility on Willingdon Island, under a kilometre from the Cochin International Seaport. It holds 2,000 pallet positions — 1,890 racked across 3 independently controlled chambers of 630 each, plus 110 chilled in the ante room — with deep freeze at −25 °C to −18 °C, an ante and dispatch room at 4–8 °C, two loading docks, four reefer plug-in points, generator backup, redundant compressors and 24×7 temperature monitoring.

What we are not going to do is print a changeover time or a fuel-autonomy figure in a blog post, because a number in a blog post is not evidence of anything. Those are things to be shown, standing in the plant room, with the monitoring screen in front of you.

So come and look. A site visit takes under an hour: the genset and how it starts, the compressor redundancy, the monitoring record for a chamber, and the dock with the reefer plug-in points, which is where most temperature actually gets lost. Bring the three generator questions above and ask them of us — then ask them of everyone else you are considering. The facilities worth your pallets will answer all three without hesitating.

Call +91 94006 24908 to arrange a walk-through, or tell us what you are storing and we will send times. The full storage specification is here.