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Battery Energy Storage

BESS Solutions —
Store Smarter, Dispatch Precisely

From 50 kWh commercial systems to 20+ MWh grid-scale installations — TESAS designs, engineers, and commissions Battery Energy Storage Systems that reduce peak demand charges, enable renewable integration, and provide reliable backup power.

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What We Deliver

Complete BESS Engineering, Supply & Integration

TESAS offers a full-spectrum BESS service — from initial feasibility and detailed design to procurement, commissioning, and long-term O&M. We are chemistry-agnostic and select LFP, NMC, or flow batteries based on your load profile, safety requirements, and capex budget.

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Feasibility & ROI Analysis

Detailed tariff analysis, load profiling, and financial modelling to quantify payback and IRR before any capital commitment.

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System Sizing & Simulation

Half-hourly load simulation to right-size the battery and inverter — no over-sizing, no under-delivery.

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Procurement & Supply

Vendor-agnostic sourcing of cells, BMS, PCS, and EMS — we help you get the best price without quality compromise.

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Integration & Commissioning

Civil, electrical, and control integration — including grid connection approvals, CEA documentation, and DISCOM liaison.

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O&M & Remote Monitoring

24/7 cloud-monitored SCADA, proactive maintenance contracts, and performance guarantee SLAs.

BESS System Architecture — EMS, Battery System, PCS
Use Cases

Where BESS Creates Value

⚡ Peak Demand Shaving
Discharge during ToD peak hours to reduce sanctioned demand and eliminate demand charges — typically 20–40% reduction.
☀️ Solar Self-Consumption
Store daytime solar surplus and use it during evening peak — lift self-consumption from 60% to 95%+.
🔒 Critical Load Backup
UPS-grade seamless switchover for data centres, hospitals, and manufacturing lines — no diesel required.
⚖️ Frequency & Voltage Regulation
Grid-scale BESS providing ancillary services — primary frequency response and voltage support.
Technical Depth

BESS Technology Portfolio

Cell Chemistry Options

ChemistryBest ForCycle Life
LFP (LiFePO₄)Commercial & Industrial ESS4,000–8,000
NMC 811High energy density apps2,000–4,000
LTOFast cycling, cold climates15,000+
VRFB (Flow)Grid-scale, long duration20,000+

System Configurations

ScaleCapacity RangeApplication
C&I Small50 kWh – 500 kWhApartments, offices
Industrial500 kWh – 5 MWhFactories, campuses
Grid-Scale5 MWh – 100+ MWhUtilities, renewables

Integrated System Components

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Battery Modules
Rack / containerised / cabinet format
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PCS / Inverter
Bidirectional AC-DC, up to 6 MW per unit
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EMS / SCADA
Real-time optimisation & remote control
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Thermal Management
Liquid cooling or precision AC for cells
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Fire Suppression
Novec / HFC-based, auto-activation
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Grid Interface
Modbus, DNP3, IEC 61850 ready
TESAS EMS Platform

Energy Management System — Optimise Every kWh

TESAS's proprietary EMS is the intelligent brain of every BESS deployment. It monitors, controls, and optimises your battery assets in real time — coordinating battery dispatch with solar generation, grid tariffs, and load forecasts to maximise savings and minimise cell wear.

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AI-Powered Dispatch Optimisation

MILP-based scheduling engine optimises charge/discharge cycles against day-ahead ToD tariffs and load forecasts — delivering 15–25% higher ROI than simple rule-based controllers.

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Multi-Asset Coordination

Seamlessly coordinates BESS with rooftop solar, diesel gensets, and EV chargers — single pane of glass for all on-site energy assets.

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Predictive SoH Management

ML-based degradation modelling adjusts charge rates and depth of discharge to extend battery life by up to 20%, protecting your capex.

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SCADA & Remote Control

Web dashboard + mobile app for real-time energy flow monitoring, operating mode changes, and fault alerts. IEC 61850 and Modbus TCP compatible.

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Automated Monthly Reports

PDF reports showing kWh throughput, peak demand reduction, CO₂ avoided, and financial savings vs. your pre-BESS baseline.

Explore AI-Driven EMS →
TESAS EMS Dashboard
<20ms
Dispatch Response
99.9%
Platform Uptime SLA
25%
Extra ROI vs Rule-Based
20%
Battery Life Extension
Hardware Portfolio

BESS Container & Power Conversion System

TESAS integrates containerised BESS units with proven PCS partners — CATL, BYD, Delta, SMA, Sungrow — delivering reliable, scalable, and fully serviceable energy storage installations.

TESAS Containerised BESS

Containerised BESS

Turnkey container BESS units — pre-assembled, factory-tested, and ready for rapid deployment. Available in 20-ft and 40-ft ISO container formats.

Capacity Range500 kWh – 5 MWh per container
DC Voltage750V – 1500V DC bus
ChemistryLFP (standard) / NMC (high-density)
CoolingPrecision air / liquid cooling
ProtectionIP54, fire suppression (Novec)
CertificationsIEC 62619, UN38.3, BIS
Delta Bidirectional PCS

Power Conversion System (PCS)

We partner with global PCS leaders — Delta, SMA, Sungrow, and Huawei — to source the right bidirectional inverter for your grid connection, power rating, and budget.

Power Range100 kW – 6 MW per unit
Grid InterfaceLV (415V) / MV (11kV/33kV)
Round-Trip Efficiency>96% (PCS + battery)
Grid ComplianceIEC 61727, CEA 2010
Response Time<20ms frequency response
CommunicationsModbus TCP, DNP3, IEC 61850
EPC Delivery

TESAS as Your EPC Partner

We deliver BESS projects on an Engineering, Procurement & Construction (EPC) basis — managing every phase from feasibility study to handover, so you have a single accountable partner and zero coordination gaps.

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Engineering

Detailed design, SLD, protection relay coordination, structural drawings, and DISCOM / CEA documentation.

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Procurement

Vendor RFQs, FAT at factory, import/logistics, and on-site goods receipt inspection — best price, no compromise on quality.

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Construction

Civil foundations, container placement, HT/LT electrical, earthing, cable management, and control room fit-out.

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Commissioning

SAT execution, grid synchronisation, performance testing, operator training, and 1-year Defects Liability Period.

Why Choose TESAS as EPC Partner?

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Single-Point Accountability
One contract, one team — no finger-pointing between equipment and civil contractors.
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22+ Years Domain Expertise
Founding team's experience spans BMS hardware, power electronics, and large-scale energy system integration.
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Vendor-Agnostic Selection
We choose components on merit — not on distribution agreements or exclusive dealerships.
Our Methodology

How We Deliver Your BESS Project

1
Load Audit
We collect 12 months of half-hourly consumption data and analyse tariff structure.
2
System Design
Sizing, chemistry selection, single-line diagrams, and simulation-validated energy models.
3
Procurement
Competitive sourcing, factory acceptance testing, and logistics to site.
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Civil & Electrical
Site preparation, containerised BESS placement, HT/LT panel integration, and earthing.
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Commission & Handover
Full system testing, DISCOM synchronisation, and operations training for your team.
Certifications & Standards

Built to Code

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IEC 62619
Battery safety for ESS
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IEC 61851
Grid-connected systems
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CEA 2010
Indian grid regulations
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IS 16046
BIS battery standard
Free Assessment

Ready to Cut Your Energy Costs?

Our engineers will analyse your electricity bills and site conditions to model your exact BESS savings — free of charge.

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