Capture surplus generation
Store energy when PV output exceeds immediate demand or dispatch needs.
Utility-Scale Energy Storage Solution
Energy at Scale.
Built for the Grid.
Bring solar generation, containerized battery storage and AC-coupled control together in one scalable energy system.
01Solar IntegrationUse more renewable generation
02Containerized BESSFactory-integrated storage units
03AC-Coupled ControlCoordinate PV, PCS and grid
04MW-Scale GrowthExpand power and duration
Why Utility-Scale Storage
Make Renewable Energy More Dispatchable
Large energy projects need storage that responds to generation variability, grid conditions and changing demand.
Respond to grid demand
Coordinate charge and discharge around power and capacity requirements.
Build in phases
Plan container, PCS and MV capacity around the project roadmap.
Operate as one system
Use EMS visibility to align generation, storage and interconnection.
How It Works · The Technology Path
AC-Coupled Architecture for Utility-Scale Energy Storage
The PV plant and battery system connect independently to a shared AC bus. EMS coordinates dispatch across PCS, medium-voltage interconnection and the grid.
Supervisory controlEMSMonitoring · dispatch · system coordination
GenerationPV ArraySolar power input
Shared connectionAC BusPower collection
InterconnectionTransformer / MVVoltage step-up
Export / ImportUtility GridGrid interface
Bidirectional conversionPCSAC ↔ DC
Energy storageBESSBattery containers
DemandEnd-use LoadsIndustrial and local use
Flexible AC-coupled integrationIndependent PV and storage expansionGrid support and planned backupEMS coordinated controlMW to multi-MWh scaling
The Engineered Storage Unit
Containerized BESS for Large-Scale Deployment
Each enclosure is a factory-integrated storage unit, designed around electrical, thermal, safety and control requirements.
20FT integrated unit
250kW / 803kWh
20FT Containerized BESSA compact, factory-integrated storage unit for distributed utility and large site projects.
View Container →
40FT integrated unit
500kW / 2MWh
40FT Containerized BESSA higher-capacity integrated unit for multi-container energy storage plants.
View Container →Integrated engineering
Integrated BMSThermal ManagementFire ProtectionOutdoor DeploymentModular Expansion
What We Can Deliver · Complete Systems
AC-Coupled Solutions at MW Scale
Two complete configurations bring containerized storage, PCS and transformer design into a project-ready system.
Complete AC-Coupled Solution
1MW / 2MWh
AC-Coupled Energy Storage System- Power / Capacity
- 1MW / 2MWh
- Container configuration
- Project-specific container configuration
- PCS / Transformer
- PCS and transformer sized to grid requirements
- Typical application
- Utility PV integration
Complete AC-Coupled Solution
2MW / 4MWh
AC-Coupled Energy Storage System- Power / Capacity
- 2MW / 4MWh
- Container configuration
- Project-specific multi-container configuration
- PCS / Transformer
- PCS and transformer sized to grid requirements
- Typical application
- Grid support and larger storage plants
Application Scenarios
Designed for demanding energy projects
System power, storage duration, interconnection and operating mode are engineered for each site.
Utility Solar + Storage
Make renewable generation more dispatchable.
Grid Support
Support power balancing and capacity needs.
Microgrid
Coordinate generation and storage across a local network.
Large Industrial Site
Serve critical demand with project-scale storage.
Real Utility Projects
Proven in real-world energy projects
Published projects with recorded storage capacity from the Bluesun project library.
View All Projects →
Madagascar
Madagascar 630 KW Solar Energy Project + Energy Storage
- Solar PV
- 630 KW
- Storage
- 2 MWh
- Application
- Solar Energy Project + Energy Storage
Kosovo
Kosovo 2.8 MW Solar Energy Project + Energy Storage
- Solar PV
- 2.8 MW
- Storage
- 2 MWh
- Application
- Solar Energy Project + Energy Storage
Bulgaria
Bulgaria 1 MW Solar Energy Project + Energy Storage
- Solar PV
- 1 MW
- Storage
- 2.2 MWh
- Application
- Solar Energy Project + Energy Storage
Frequently Asked Questions
Answers for utility project planning
Key questions before detailed system sizing and grid engineering.
What is AC coupling in a utility-scale project?
PV and battery storage connect through their own conversion equipment to a shared AC bus. The EMS coordinates charging, discharge and power exchange with the grid.
Can storage be added to an existing PV plant?
AC coupling can allow storage to be added while retaining the existing PV inverter. Compatibility, metering, grid permissions and the site single-line diagram must be reviewed.
How do I choose between 20FT and 40FT BESS containers?
The choice depends on the required power, usable energy, site footprint, duration, transport constraints and expansion plan. Detailed engineering confirms the container configuration.
What is included in a containerized BESS?
A project configuration can integrate battery racks, BMS, thermal management, fire protection, electrical protection and monitoring. The exact scope is confirmed in the technical proposal.
Can the system support grid services or backup?
Grid support and backup depend on the PCS, switching design, EMS strategy, interconnection requirements and the loads to be served. These functions must be engineered for each project.
Can a project grow beyond 2MW / 4MWh?
Containerized units can be combined for larger power and energy requirements, subject to site layout, MV equipment, controls and local grid approval.
Build at Project Scale
Plan your utility-scale storage project with Bluesun
Share your PV capacity, required storage duration and grid conditions for a tailored engineering proposal.