Energy Storage Solution

Battery Energy Storage System (BESS) Solution

Transformer solutions for grid-scale and C&I battery storage — PCS-adapted, bi-directional, harmonic-tolerant. From PCS step-up to grid connection, with containerized options.

Bi-directional PCS-adapted Cyclic Loading Containerized
Core Capability

PCS Adaptation & Bi-directional Operation

Engineered around the inverter — every unit is matched to the PCS it serves, not the other way round.

PCS Matching

PCS-to-Transformer Interface

Transformers matched to PCS output characteristics: voltage, current, harmonic spectrum, and switching frequency.

Bi-directional

Charge & Discharge

Bi-directional power flow design — transformer handles both charging and discharging cycles without derating.

Cyclic

Cyclic Loading Design

Thermal design optimized for cyclic loading patterns typical of BESS operation, ensuring insulation longevity.

Engineering Data

Key Technical Parameters

Standard design envelope — every project is then tuned to site and PCS data.

Capacity100–3150 kVA per unit; parallel operation for larger systems
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Voltage0.4/0.69kV (PCS) → 10/20/35kV (grid); main step-up 35→110/220kV
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HarmonicsK-factor rated for PCS switching harmonics; eddy-current loss controlled
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Temperature riseDesigned for cyclic thermal loading; F/B insulation class
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EfficiencyLow no-load + load loss for maximum round-trip efficiency
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ProtectionIP54 outdoor; containerized option with integrated cooling
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MonitoringRemote monitoring interface — temperature, DGA, OLTC position (optional)
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Step-up stationIntegrated BESS step-up station: transformer + PCS interface + switchgear
Integrated Delivery

BESS Step-up Station (Integrated Solution)

One coordinated package instead of four separate vendors — factory-tested as a system.

Integrated

Energy Storage Step-up Station

Pre-fabricated station: bi-directional transformer + PCS integration + HV/LV switchgear + protection + monitoring.

Container

Containerized Solution

20ft/40ft container with transformer, switchgear, cooling, and fire suppression — plug-and-play deployment.

Monitoring

Remote Monitoring Interface

SCADA-ready: temperature, oil level, DGA, load profile, fault alarms — for remote BESS management.

Recommended Configuration

BESS Transformer and Station Options

Choose a proven starting point, then let our engineers adapt voltage, capacity, impedance, cooling, enclosure and documentation to the project.

Key design factors

  • Bi-directional cycling and harmonic loading
  • PCS voltage window and overload profile
  • Fire separation, enclosure and monitoring scope

What to send us

  • BESS MW/MWh and PCS data
  • Grid connection voltage
  • Installation layout and auxiliary loads

Have a BESS project?

Send us your PCS specs, system capacity, and site conditions. We’ll propose the right transformer and step-up station configuration.

Request BESS Solution

System Integration

Energy Storage Connection Architecture

BESS Transformer Solution

BESS Transformer Solution

Transformer and enclosure configuration matched to PCS and grid requirements.

Integrated energy storage system diagram

Integrated Energy Storage System

Complete power flow and equipment relationship from storage system to grid connection.

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