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Grid-Scale Battery Energy Storage Built for the Energy Transition

JEM Utility-Scale Battery Energy Storage Systems (BESS) help utilities, renewable energy developers, independent power producers (IPPs), and grid operators improve grid stability, integrate renewable energy, perform peak shaving, and unlock new revenue streams through ancillary services. Our scalable containerized BESS solutions support projects from 2 MWh to 500 MWh with advanced Energy Management Systems (EMS), industry-leading safety, and long-term reliability.

2–500 MWhGrid-Scale BESSAdvanced EMS
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// Core Capabilities

Engineered for your application.

Grid Stability & Frequency Regulation

Deliver fast-response frequency regulation, voltage support, and ancillary grid services that improve network reliability and support modern renewable-heavy grids.

Renewable Energy Integration

Store excess solar and wind generation, reduce renewable curtailment, and dispatch clean energy when demand is highest to maximize renewable asset utilization.

Peak Shaving & Energy Arbitrage

Charge during low-cost energy periods and discharge during peak demand windows to reduce energy costs and create additional revenue opportunities.

Grid Resilience & Black Start Capability

Support grid restoration during outages and provide critical backup capabilities for utilities, substations, and essential infrastructure.

Modular & Scalable Architecture

Containerized Battery Energy Storage Systems designed for rapid deployment and seamless scalability from pilot projects to multi-hundred-MWh installations.

Advanced Energy Management System

Intelligent EMS optimizes charge-discharge cycles, renewable integration, grid services participation, and asset performance in real time.

// Deployment Process

How we deliver your system.

From site study to live O&M — a structured process with clear milestones and no surprises.

01

Site Assessment & Feasibility Study

Detailed analysis of grid conditions, renewable generation profiles, load requirements, and project economics to determine the optimal BESS configuration.

02

Engineering & System Design

Comprehensive electrical, civil, and control system design ensuring compliance with utility requirements, grid codes, and safety standards.

03

Manufacturing & Factory Acceptance Testing

Battery modules, power conversion systems, and control platforms are assembled, tested, and validated prior to deployment.

04

Installation & Commissioning

Turnkey deployment including system integration, grid synchronization, SCADA connectivity, and performance validation.

05

Monitoring & Lifecycle Support

24/7 remote monitoring, predictive maintenance, performance optimization, and long-term asset management services.

Utility-scale Battery Energy Storage System (BESS) installation at a solar park
Battery Energy Storage System container interior showing battery racks and BMS
Grid interconnection substation connected to utility-scale BESS
// Technical Specifications

The numbers that matter.

Download full data sheet →
Energy & Power
Nominal capacity2 MWh – 500 MWh (modular)
Power output1 MW – 250 MW (scalable)
Round-trip efficiency≥ 95% AC-AC
Depth of discharge90% (default), 95% max
Cell & Enclosure
Cell chemistryLFP (LiFePO₄), prismatic
Enclosure10 ft / 20 ft
IP ratingIP55 enclosure, IP65 PCS
Operating temperature–20 °C to +55 °C
Performance & Life
Cycle life≥ 6,000 cycles @ 70% DoD
Calendar life20 years
Response time (full power)< 200 ms
Ramp rate10–100% in < 1 s
Grid Interface
Grid voltage11 kV / 33 kV / 66 kV (via transformer)
Grid codesIEGC, CEA regulations
CommunicationMODBUS TCP, DNP3
ProtectionAnti-islanding, over/under voltage, ROCOF
// Use Cases

Where it gets deployed.

Renewable Energy Firming

Transform variable solar and wind generation into reliable dispatchable energy by storing excess generation and delivering power when needed.

Solar + StorageWind + StorageFirm Power

Grid Frequency Regulation

Provide fast-response ancillary services that stabilize frequency deviations and improve overall grid reliability.

Frequency RegulationAncillary ServicesGrid Stability

Peak Demand Management

Reduce stress on transmission and distribution infrastructure by managing demand peaks and balancing grid loads.

Peak ShavingLoad BalancingGrid Support

Transmission & Distribution Deferral

Delay costly network upgrades by strategically deploying Battery Energy Storage Systems to support constrained grid infrastructure.

Grid ModernizationCapex ReductionT&D Deferral
// Let's build

Ready to build resilient energy infrastructure?

Talk to our engineering team about sizing, safety and deployment timelines for your site or grid.