Data centre with UnityESS battery backup power
Applications · Data Centres

Uptime is not negotiable.

Sub-20ms switchover, UPS replacement, and peak demand management for data centres and critical IT infrastructure that operate at 100% availability.

The Challenge

The economics of data centredowntime are brutal.

A data centre is not a building — it is a promise. Every SLA, every uptime guarantee, every co-location contract is built on the assumption that the power never fails. When it does, the costs are immediate and reputational.

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Downtime cost

An unplanned outage in a tier-3 data centre costs an average of ₹40–80 lakh per incident in direct costs — hardware damage, data recovery, SLA penalties, and client attrition. The reputational cost is harder to quantify.

₹40–80L
Average cost per unplanned outage incident in a mid-size data centre
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Peak demand charges on continuous load

Data centres draw continuous, high-density power 24/7. The demand charge structure penalises exactly this load profile — high baseline demand with occasional AI workload spikes that set the peak used to calculate the monthly bill.

40%
Proportion of data centre energy bills attributable to demand charges
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VRLA battery replacement cycles

Traditional UPS systems use VRLA batteries with 3–5 year replacement cycles. In Indian humidity and temperature conditions, that cycle shortens further. The replacement cost, downtime, and disposal logistics are significant recurring costs.

3–5 yr
VRLA battery replacement cycle — shortened by Indian ambient conditions
The Solution

What a Unity ESS systemdoes for a data centre.

From UPS replacement to demand charge reduction — the outcomes across Unity ESS data centre installations.

01
Sub-20ms switchover — below UPS transfer time
Unity ESS transfers to battery in under 20 milliseconds — faster than most UPS systems, and certainly faster than any generator. The IT load sees no interruption, no voltage sag, no restart cycle.
02
UPS replacement for Tier 2 and Tier 3 facilities
For facilities currently relying on VRLA UPS banks, Unity ESS provides a direct replacement with longer life, lower maintenance, and no hazardous battery disposal. LFP cells deliver 8,000+ cycles versus 500–800 for VRLA.
03
Peak demand shaving for AI workloads
GPU cluster activation, training runs, and inference peaks create sudden, sharp demand spikes. The Unity EMS detects these and discharges the battery to absorb the spike — preventing it from registering at the demand meter.
04
Power density in a small footprint
Unity Aura delivers 261 kWh in a compact outdoor cabinet — high energy density for the floor space available in a data centre environment. Multiple units scale to meet the facility’s full backup requirement.
05
DC round-trip efficiency above 94%
Higher round-trip efficiency means less energy wasted in the storage cycle — directly reducing the operating cost of every kWh of backup capacity. At data centre scale, the efficiency difference matters.
06
24/7 monitoring with predictive alerts
The Unity EMS monitors battery health, cell temperature, state of charge, and grid status continuously. Predictive alerts flag degradation trends before they become failures — months before a VRLA system would show any symptom.

"We decommissioned 40 VRLA battery strings and replaced them with two Unity ESS cabinets. The footprint is smaller, the maintenance is gone, and we have not had a single transfer event that the IT team noticed."

Infrastructure Director · Tier 3 data centre, Bangalore · Unity Aura installation · Year 2
Recommended Systems

Built for continuouscritical load.

The Unity Aura covers most data centre backup requirements in a compact, high-density cabinet. For larger facilities, multiple units scale to full-facility coverage.

Air cooled · Critical infrastructure

Unity Aura

100 kWh – 225 kWh · 25 kW – 65 kW per unit · Scalable

The standard choice for data centre UPS replacement and peak demand management. Sub-20ms transfer, LFP cells with 8,000+ cycle life, and 94%+ round-trip efficiency. Outdoor-rated IP54 for flexible placement. Multiple units scale to full-facility backup.

Switchover<20 ms
ChemistryLFP 314Ah
DC RTE>94%
Cycle life8,000+ cycles
ProtectionIP54
Best forUPS replacement · Peak shaving · Colocation
Also Powering

Other applications.

UnityESS storage cabinets on a solar site at sunrise
Tell Us About Your Data Centre

Our engineering team willsize the right system for you.

Send us your load profile and we’ll return a proposal within 24 hours.