Name: Gridvik record PRJ-095 — CtrlS Mumbai DC 1 and DC 2
Creator: Gridvik

CtrlS publishes its first two Navi Mumbai buildings as a single card: 40 MW of power capacity across 5,555 racks and 394,177 square feet. That is 7.2 kW a rack and 101 watts a square foot — the least dense card on the campus and, as it happens, the only one where nobody outside the company can say which building holds what. A directory splits the pair as 20 MW and 16 MW. A 2020 press release described DC 2 alone at 24 MW across 1,800 racks. All three cannot be right, and the operator has published only one of them.

1At a glance

Operator

CtrlS Datacenters Limited

Facilities

DC 1 and DC 2, the first two buildings on the Navi Mumbai campus at Mahape and Airoli. Published as one combined listing

Listed capacity

40 MW of power capacity, not labelled as IT load

Physical

5,555 racks across 394,177 square feet, a Tier-4 standard build with a nine-zone security layout

Density

7.2 kW a rack and 101 watts a square foot

Vintage

DC 2 was launched in 2019. The pair predates every other building on the campus

Status

Stage unverified per building. Both are described as operating in directory records

Not disclosed

The split of capacity, racks or floor area between the two buildings, IT load, PUE and occupancy

Additivity

Not additive — it sits inside the 700 MW campus aggregate recorded as PRJ-094

2Why two buildings share one card

Operators combine buildings on a card for sensible reasons: one substation, one security perimeter, one sales team, one set of redundancy claims. The cost is that the reader cannot size either half.

What the combined card hides
Question a reader would ask	Answer available
How much power does DC 1 have?	not published separately
How many racks does DC 2 have?	not published separately
Which building is denser?	unknown — the 7.2 kW is an average of both
Which one has spare capacity today?	unknown
When was each commissioned?	DC 2 in 2019; DC 1 not stated on the card

Other sources fill the gap inconsistently. A market commentary splits the pair as DC 1 at 20 MW over 200,000 square feet and DC 2 at 16 MW. A directory carries the pair at 36 MW combined. A 2020 company release described the second building at 24 MW installed across 1,800 racks and 132,000 square feet.

Note what that does to the arithmetic. If DC 2 were 24 MW in 2020 and the pair is 40 MW now, DC 1 is 16 MW. If DC 2 is 16 MW, DC 1 is 24 MW. The two readings are exact opposites, and both sum to a number that is close to a published figure. That is how a plausible error becomes permanent.

What Gridvik records

40 MW, 5,555 racks and 394,177 square feet for the pair, because that is the only statement the owner of the buildings makes.

We do not split it, and we flag every page that depends on the split as unverified.

37.2 kW a rack

Seventy-two hundred watts a cabinet is the specification of an Indian data centre designed between 2015 and 2019. It is a perfectly serviceable enterprise density and it is half of what the same operator is now building next door.

Figure 1Four Navi Mumbai cards. The red bar is this record, and the gap to the navy bar is five years of specification change in one estate.

The campus, four cards
Card	Power	Racks	kW a rack	W per sq ft
DC 4	36.8 MW	2,936	12.5	139
DC 5	32 MW	2,750	11.6	140
DC 3	10 MW	1,045	9.6	68
DC 1 and DC 2	40 MW	5,555	7.2	101

The bottom row carries the most power of any card and the least density. That combination is exactly what a 2015 to 2019 build looks like: large floorplates, a great many cabinets, and an electrical design from before anyone asked for 12 kW a rack.

For a buyer of capacity this is the cheap end of the market and the right place to look for large-volume, low-density workloads — batch processing, storage, disaster recovery, government systems. For a vendor it is a refresh queue of 5,555 cabinets that will never be as valuable as the ones in DC 4 and DC 5.

4The Mahape node

These buildings sit in the densest data centre cluster in India. Mahape and Airoli, with Rabale and Ghansoli, hold more megawatts within a few square kilometres than most Indian states hold within their borders.

What is within a few kilometres
Neighbour	Capacity	Note
CtrlS, this campus	40 MW in these two buildings; 116 MW across five	the anchor of the node
An NTT hyperscale campus at Mahape	a 150 MW campus plan, phase one 90 MW across two buildings	45 MW operating in the first building
An ST Telemedia three-building campus	about 120 MW when complete	the incumbent rival for enterprise demand
A CapitaLand greenfield site	announced, with a declared PUE of 1.4	the newest entrant
A 40 MW building under construction nearby	a new operator breaking ground in 2026	the pipeline responding to demand

The node is the argument. Cable landing stations, the Mumbai fibre ecosystem, a workforce and a state government that has been generous with power all sit inside one industrial belt, which is why four operators with 40 to 150 MW plans are all building in it.

The constraint is land and grid, not demand, and that is why the operator behind this page went 40 kilometres north to a 13-building campus instead of adding buildings at Mahape.

5Timeline

2015
The first Navi Mumbai building enters service as the company’s anchor facility
2019
DC 2 is launched; a later company release describes it at 24 MW across 1,800 racks and 132,000 square feet
2020
The pair is certified and marketed as a Tier-4 standard campus with more than 5,000 racks
2026
The operator publishes the pair as one card at 40 MW, 5,555 racks and 394,177 square feet
26 October 2026
No published split of capacity between the two buildings, and no IT-load basis for the 40 MW

6Procurement

Procurement window and scope

Gridvik assessment · 26 Oct 2026

What this pair buys

Refresh, spares and incremental efficiency across 5,555 cabinets. This is a maintenance estate, not a growth estate

The upgrade question worth asking

Whether the halls were built with the electrical headroom to go from 7.2 to 12 kW a rack. If they were, this is a ₹1,000 crore-class refresh opportunity. If they were not, it is a demolition candidate

Why a vendor should visit

It is the oldest, largest and most heavily tenanted part of the campus, and the operator’s references come from here

Account structure

Central procurement from Hyderabad; the Mumbai campus executes

Likely window

Continuous refresh while capital goes to DC 6 and DC 7

Quality of evidence

Weak on the split, strong on the total. Three sources, three different partitions

Our confidence

High on the combined 40 MW, 5,555 racks and 394,177 square feet. Nil on the per-building split

All estimates are labelled as estimates. No tender dates claimed, no private contact data published.

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7Limits and open questions

What this record is

The first two buildings on India’s largest private data centre campus, published as one 40 MW card at 7.2 kW a rack

What it is not

Two records. There is no published way to size either building separately

What Gridvik will not do

We will not adopt 20 and 16 MW from a third party, or 24 MW for DC 2 from a 2020 release, as if either were the operator’s current position

First question

What is the split? A power bill, a fire NOC or a site plan settles it, and none is public

Second question

Is 40 MW gross or IT? A gross figure with 5,555 racks implies about 7.2 kW a rack at the cabinet; an IT figure implies more density in the halls and more overhead outside them

Why this record matters

It is the largest single card on the campus, and it is the clearest illustration in this registry of a combined listing making due diligence impossible

What changes the tier

A per-building split, an IT-load statement, or a commissioning date for DC 1

8Sources

Sources: CtrlS Mumbai data centre page, CtrlS corporate site, CtrlS datacenters page, Data Center Dynamics on the campus build, Baxtel Navi Mumbai listings, datacenterlocations, dcmarketinsights, and Indian market commentary on the Navi Mumbai data centre nodes.