Record PRJ-029Maharashtra — Rabale, Navi MumbaiTier A — most published engineering in India17 public sources cross-checked
96.94 MW built377+ MW across 12 towersN+2 CRAC · N+1 gensetsOperating since 2013
377+MW
Campus design
96.94MW
Built · 5 towers
12
Towers planned
15,000+
Racks
99MW
Solar + wind
220kV
GIS substation
Sify's Rabale campus is the most thoroughly documented data centre in India — and one of the largest. It has been operating since 2013 and is designed for 377+ MW across 12 towers; five towers are built, carrying 96.94 MW as of June 2025. It publishes what almost no Indian operator does: N+2 CRAC redundancy, N+1 generators, 48 hours of fuel, a 6,300 mm floor-to-floor height, 2,100 kg/sqm floor loading, a 110 kV substation for the first three towers and a 220 kV GIS substation for the rest, and 99 MW of dedicated solar and wind.
1At a glance
Record ID
PRJ-029 — Gridvik India Data Centre Registry
Project
Sify Mumbai 03 — Rabale, Sify's largest AI-ready hyperscale campus
Operator
Sify Infinit Spaces Limited, the data-centre subsidiary of Sify Technologies (NASDAQ: SIFY)
Live and expanding. Five towers operational since 2013; towers 6, 7, 11 and 12 stated for 2026; towers 8–10 in planning
Capacity
377+ MW campus design across 12 towers. 96.94 MW built across five towers as of 30 June 2025
Rack capacity
15,000+ racks at campus level · Tower 5 alone at 2,500+ racks
Power
On-premises 110 kV substation for Towers 1–3 and a 220 kV GIS substation for Towers 4 onward · 99 MW of dedicated solar and wind · up to 70% renewable
Engineering
N+2 CRAC redundancy · N+1 generators for IT and non-IT distribution · 48 hours of fuel at full load · 6,300 mm floor-to-floor · 2,100 kg/sqm floor load · 700 mm raised floor
Gridvik tier
A — the best-documented engineering opportunity in Indian data centres. Three quarters of the campus is still to build
2Capacity reconciliation — 377 against 96.94
This is the largest gap between design and build of any campus in the registry, and it is the most important thing to understand about Rabale.
Figure 1Rabale by tower group. Towers 1 to 4 have been built in phases since 2013 and carry about 54 MW. Tower 5 adds 43.30 MW of design capacity. Together they make 96.94 MW built against a 377+ MW campus design across 12 towers.
What each figure measures, tower by tower
Element
IT capacity
Status
Note
Towers 1 + 2
22 MW
Operational
Built on the 110 kV substation
Tower 3
24 MW
Operational
Also 110 kV
Tower 4
8.1 MW
Operational
First tower on the 220 kV GIS substation
Tower 5
43.30 MW design
Live
G+8, hyperscale-ready · 30.24 MW installed as of Jun 2025
Built total, 5 towers
96.94 MW
As of 30 Jun 2025
The operator's stated built IT power
Towers 6, 7, 11, 12
Stated for 2026
Not built
Tower 6 specified at 26 MW
Towers 8–10
In planning
Not designed
Each tower designed for up to 40 MW
Campus design
377+ MW
12 towers
The full-build claim
Gridvik read — 96.94 MW built, roughly 280 MW to go
Rabale is the clearest example in India of a campus that will keep buying equipment for a decade. Five towers took twelve years to build. Seven more are planned.
Two traps in the published numbers. First, Tower 5's 43.30 MW is inside the 96.94 MW — it is not additional to it, and adding them gives a wrong total. Second, the 377+ MW has been reported as 200 MW in older materials and still appears that way in some trackers. The figure has grown because the tower count grew from 10 to 12.
There is also a genuine internal inconsistency: the 2022 factsheet describes Tower 5 at 38.8 MW with 2,500+ racks; the 2025 operator page describes the same tower at 43.30 MW design with 30.24 MW installed. The tower was uprated. Gridvik uses the current figures and records the earlier ones.
3The engineering specification
This section is the reason the page exists. Sify publishes specifications that most Indian operators treat as commercially confidential — and for a vendor, these numbers determine quantities before any tender is issued.
Generator configuration
N+1, separately for IT and non-IT distribution. The separation is the notable part: IT and non-IT loads are backed by independent generator sets, so a failure in one train does not affect the other. Most Indian facilities run a single N+1 configuration across both
Fuel autonomy
48 hours at full load on the 2022 factsheet, and 32 hours stated for the Tower 5–10 factsheet. The difference matters for tank sizing and for CPCB compliance — Gridvik records both and does not reconcile them
CRAC redundancy
N+2. Two more computer-room air-conditioning units than the load requires. This is a higher specification than the N+1 that most Indian facilities publish, and it directly multiplies the unit count on every hall
Chiller type
Hybrid — both air-cooled and water-cooled chillers. This is unusual and deliberate: it gives the operator the ability to shift between water-intensive evaporative cooling and air-cooled operation, which matters enormously in a water-constrained market and increasingly matters for green financing
Structural
6,300 mm floor-to-floor height and 2,100 kg/sqm floor loading, on a G+8 frame with 700 mm raised floor. Six metres of floor-to-floor is roughly double a standard commercial floor — it is what allows high-density halls, overhead services and liquid-cooling distribution without lowering ceiling void
Seismic design
IS 1893:1984 design standards — code-compliant, without the dampers used at NTT's Noida 2
Power distribution
A+B power to racks, with PDUs enabled for branch-circuit monitoring — dual-path distribution to every rack, which is the design needed for any workload with a rated availability commitment
Security
10 layers of physical and electronic access control from entry to cage, on a K4-rated perimeter
Connectivity
Three clear access paths and four diverse fibre paths to each building, with dual meet-me-rooms and network interconnection across towers
Why this section is the commercial value
A vendor reading this can size the genset order, the CRAC order and the chiller order for the remaining seven towers before speaking to anyone. That is the difference between a cold call and a calculated approach
4Power — two substations, twelve towers
110 kV substation
On-premises, serving Towers 1, 2 and 3. This is the standard Indian data-centre connection voltage and supports the roughly 46 MW built on those three towers
220 kV GIS substation
On-premises gas-insulated switchgear, serving Tower 4 onward — with some operator material extending it to Towers 4 through 10. This is the top end of Indian data-centre power infrastructure
Why the upgrade happened
Towers 1–3 total about 46 MW. Tower 4 onward at up to 40 MW each needs more headroom than 110 kV can sensibly supply, so Sify built a separate 220 kV connection for the later phases. That is a capital decision taken years before the capacity was needed — and it is why the remaining seven towers are credible rather than aspirational
Renewable power
99 MW of dedicated solar and wind, with up to 70% renewable energy supplied. This is the largest published dedicated renewable allocation for a single Indian campus
What 99 MW against a 377 MW design implies
Full-build renewables would cover roughly 26% of the campus load at peak — which is why the stated 70% figure must be measured on an energy basis rather than a capacity basis. Annual energy matching, not instantaneous capacity matching
The distinction worth knowing
70% renewable on an annual matched-energy basis is the Indian industry norm. PDG's Mumbai campus is piloting hourly time-matched carbon-free energy, which is a materially harder standard. Sify's claim should be understood as the annual basis unless stated otherwise
What is not disclosed
The MVA rating of either substation, the sanctioned load, the DISCOM, and the grid connection dates for the unbuilt towers
5The AI layer
What the certification actually says
Sify became India's first provider in the NVIDIA DGX-Ready Data Center programme, certified for liquid cooling, in September 2024 — at Rabale. Chennai 02 and Noida 02 followed in May 2025.
The certification was stated against 130 kW per rack capacity, which Sify's chief executive described as support for 7 to 8 GPU servers per rack. The programme attests that the facility's power and cooling deployment can support DGX-class liquid-cooled systems.
What it qualifies the campus for
NVIDIA DGX-class liquid-cooled deployments — the highest-density AI hardware currently shipping at scale. Very few Indian facilities can accept this equipment
What it does not establish
The certification attests capability, not deployment. No GPU count, no liquid-cooled hall commissioning and no named AI tenant has been published for Rabale. Sify has publicised GPU cloud offerings, but not with disclosed capacity
Tower 5's role
Tower 5, live since 2023 and uprated to 43.30 MW of design capacity, is the hyperscale-ready tower and the one marketed against AI workloads
The 2022 versus 2025 specification
The 2022 factsheet describes Tower 5 at 38.8 MW with 2,500+ racks. The 2025 operator page states 43.30 MW design with 30.24 MW installed. The tower was uprated as the AI requirement became clearer
Why Rabale is the AI proving ground
Six metres of floor-to-floor height and 2,100 kg/sqm loading are what make high-density and liquid-cooled halls feasible without structural compromise. Most Indian facilities cannot retrofit this
Gridvik's caution
A DGX-Ready certification is a genuine and scarce qualification. It is not evidence of AI capacity in service, and Gridvik does not treat it as such
6Timeline
The Rabale campus becomes operational — Sify's Mumbai 03 facility, starting with the first towers on a 110 kV substation.
A factsheet describes Tower 5 at 38.8 MW with 2,500+ racks, a campus design of 200 MW, 15,000+ racks, 99 MW of solar and wind, 48 hours of fuel storage, N+1 generators and N+2 CRAC redundancy.
Tower 5 becomes operational — a G+8 hyperscale-ready data centre.
Sify becomes India's first provider in the NVIDIA DGX-Ready Data Center programme, certified for liquid cooling, at the Rabale facility — stated against 130 kW per rack.
Built IT power reported at 96.94 MW across five operational towers. Campus design stated at 377+ MW across 12 towers. Tower 5 uprated to 43.30 MW design.
Sify signals a US$5 billion Indian AI data-centre expansion. Towers 6, 7, 11 and 12 stated for 2026; towers 8–10 in planning.
Seven further towers, taking the campus from 96.94 MW toward 377+ MW
7Procurement
Read this before the table
Seven towers out of twelve are unbuilt. That is roughly 280 MW of design capacity at a site that has been building continuously for twelve years, with two substations in place and a published engineering specification. There is no better-quantified opportunity in Indian data centres. Everything below is a Gridvik estimate.
Procurement window and scope
Gridvik assessment · 22 Oct 2026
Order window
2026 through the mid-2030s. Towers 6, 7, 11 and 12 were stated for 2026; towers 8–10 are in planning. Because each tower is a discrete repeat of a known design, the buying is repetitive rather than one-off — which makes winning the first tower disproportionately valuable.
Procurement heat
Very high and sustained. Over a decade of continuous tower construction, a US$5 billion national expansion signalled, and a listed company with disclosure obligations.
Who buys
Sify Infinit Spaces centrally. The repeat-tower model means a single specification decision propagates across seven buildings — the highest leverage per relationship in the Indian market
DG / gensets (indicative)
Published as N+1 separately for IT and non-IT distribution. For a 40 MW tower, that implies roughly 50–60 gensets of 2,000–2,250 kVA class across both trains. Across the remaining seven towers at up to 40 MW each, roughly 350–420 units. Maharashtra requires CPCB IV+ compliance
UPS (indicative)
A+B dual-path distribution to racks with branch-circuit-monitored PDUs. Centralised UPS plant at N+1 or higher, plus rack-level distribution — both categories in scope
Cooling (indicative)
N+2 CRAC with hybrid air-cooled and water-cooled chillers. N+2 is a material multiplier: every hall needs two more CRAC units than the load requires, which raises the unit count roughly 15–25% against an N+1 design of the same capacity. The hybrid chiller arrangement means both chiller types are in scope, plus liquid-cooling CDU plant for AI halls
Categories in scope
HV/MV switchgear and 220 kV GIS · power transformers · DG and gensets for IT and non-IT trains · UPS · PDUs with branch-circuit monitoring · air-cooled and water-cooled chillers · CRAC and CRAH · CDUs, cold plates and manifolds · high-density racks and containment · structured cabling and four-path fibre · fire detection and suppression · BMS/DCIM · 32–48 hours of fuel storage · water treatment · 99 MW of renewables
Decision role
Public decision roles — in GridFeed
Stage-change history
Dated change log — in GridFeed
All estimates are labelled as estimates. No tender dates claimed, no private contact data published.
The cost and unit-count implications, and the procurement section
Capacity figure used
377+ MW campus design; 96.94 MW built. Following the registry review note, Tower 5's 43.30 MW is treated as inside the 96.94 MW built total, never additional to it
The 200 MW figure
Older Sify materials and some trackers state a 200 MW campus design. The current figure is 377+ MW because the tower count grew from 10 to 12. Both are recorded; 377+ MW is operative
The fuel discrepancy
48 hours per the 2022 factsheet and 32 hours per the Tower 5–10 factsheet. Published as-is, unreconciled
Additivity rule
Non-additive as a campus aggregate. Contains the five built towers and the seven planned ones. Never summed with Sify's national portfolio or with Chennai 02 (PRJ-028)
9Limits and open questions
Tower count
Described as 10 towers in 2024 material and 12 towers currently. Which is right for the final build is unclear
Fuel autonomy
32 hours against 48 hours across two operator documents
Substation rating
Neither the 110 kV nor the 220 kV substation MVA rating is published, nor the sanctioned load
Renewable basis
70% renewable and 99 MW of solar and wind cannot both be capacity-matched to 377 MW, so the basis is annual energy. Not stated explicitly
AI deployment
DGX-Ready certified, but no commissioned liquid-cooled halls, GPU counts or AI tenants disclosed
Tenants
None named for any tower
Towers 8–10
In planning. No capacity, design or date
What we will not claim
No PUE, no tenants, no substation rating, no confirmed AI deployment, and no equipment brands
10Sources
This record was compiled entirely from publicly available sources, cross-checked against one another.
Gridvik does not publish source URLs on record pages; citations are retained in the internal source register and are available on request.
What this page is, and what it is not
This is a public-source record of a live campus with seven towers still to build, and the most complete engineering specification published by any Indian operator.
The procurement section is labelled as estimation. No tender insider information, no private contact data, no operator-paid placement. Corrections are free and published with a date.
