2.49MWh high voltage battery energy storage system for industrial solar microgrid applications

As industries worldwide accelerate their transition toward renewable energy, a reliable power supply has become increasingly important for water treatment plants, manufacturing facilities, and other critical infrastructure.

For continuously operating industrial facilities, power interruptions can directly affect production efficiency, equipment operation, and service reliability. To address these challenges, a water treatment plant in northern Yemen recently upgraded its energy infrastructure by integrating a SunWell Energy high-voltage battery energy storage system with SunWell inverter technology.

The project integrates 6 sets of 80kW SunWell hybrid inverters with 12 units of SunWell Energy 208kWh high-voltage rack-mounted battery systems, creating a 480kVA / 2.49MWh commercial and industrial battery energy storage system (C&I BESS).

The integrated solar-plus-storage microgrid provides stable, reliable energy support for the plant's water pumps, treatment equipment, and automated control systems, while improving renewable energy utilization and operational resilience.

Project Background: Reliable Energy Supply for Critical Water Infrastructure

Water treatment plants are among the most energy-intensive industrial facilities and require a continuous electricity supply to maintain daily operations.

The plant's major electrical loads include:

  • Water pumps;
  • Filtration and treatment equipment;
  • Industrial control systems;
  • Monitoring and automation equipment.
  • Any instability in power supply may interrupt operations, reduce water processing efficiency, and increase operational costs.
  • To improve energy reliability and reduce dependence on traditional power sources, the project owner selected a solar PV and battery storage microgrid solution.
  • By combining renewable energy generation, high voltage lithium battery storage, and intelligent power conversion technology, the system provides a more flexible and sustainable energy management approach for industrial applications.

System Configuration: 480kVA Power Conversion Platform + 2.49MWh High Voltage BESS

Item Specification
Project Location Yemen
Application Water Treatment Plant Energy Supply
System Type Solar PV + Battery Energy Storage Microgrid
Inverter Brand SunWell
Inverter Configuration 6 × 80kW Hybrid Inverters
Total Inverter Capacity 480kW / 480kVA
Battery Manufacturer SunWell Energy
Energy Storage System 12 × 208kWh High Voltage Battery Cabinets
Total Battery Capacity 2.49MWh
Battery Chemistry LiFePO4 Lithium Iron Phosphate

SunWell Inverter System Enables Flexible Industrial Power Management

To support the continuous operation requirements of the water treatment plant, the project adopts a multi-inverter parallel architecture consisting of six 80kW SunWell hybrid inverters.

Compared with conventional single-inverter systems, the multi-unit configuration provides improved flexibility, reliability, and scalability for industrial energy applications.

The SunWell inverter system delivers:

  • Higher power output capability for industrial loads;
  • Improved system redundancy;
  • Reduced impact from individual equipment failures;
  • Flexible future expansion capability;
  • More efficient energy distribution management.
  • Through intelligent energy control, the inverter system adjusts power output according to real-time load demand, ensuring stable electricity supply for critical water treatment operations.

SunWell Energy High Voltage Battery System Provides 2.49MWh Energy Storage Capacity

The energy storage system utilizes SunWell Energy high voltage rack-mounted LiFePO4 battery technology, consisting of 12 units of 208kWh battery cabinets.

Each 208kWh high voltage battery system includes:

  • 13 × 51.2V 314Ah LiFePO4 battery modules;
  • 16.08kWh capacity per battery module;
  • High voltage series connection architecture;
  • Dedicated High Voltage Box for battery management and protection.

Across the entire project, a total of 156 battery modules are deployed to achieve the total 2.49MWh energy storage capacity.

Each High Voltage Box provides:

  • High voltage battery cluster management;
  • Over-voltage and over-current protection;
  • Battery status monitoring;
  • Communication interface with inverter systems.
  • The modular battery architecture simplifies transportation, installation, maintenance, and future capacity expansion, making it suitable for large-scale commercial and industrial energy storage projects.

Integrated Solar PV + SunWell Inverter + SunWell Energy BESS Solution

A key advantage of this project is the seamless integration between renewable energy generation, power conversion, and energy storage.

The complete energy architecture includes:

  • Solar PV System → SunWell Inverter System → SunWell Energy High Voltage Battery Storage → Industrial Loads
  • The integrated solar microgrid enables:
  • Direct utilization of solar energy during daytime operation;
  • Storage of excess renewable energy;
  • Stable power supply during energy fluctuations;
  • Improved renewable energy utilization efficiency.
  • This scalable energy storage solution is suitable for:
  • Water treatment plants;
  • Manufacturing facilities;
  • Industrial parks;
  • Agricultural irrigation systems;
  • Commercial buildings;
  • Remote microgrid projects.

Project Benefits: Improving Industrial Energy Resilience and Efficiency

The Yemen water plant energy storage project demonstrates the practical application of high voltage battery energy storage technology in critical infrastructure.

By combining a 480kVA inverter platform with a 2.49MWh lithium battery storage system, the project provides multiple operational benefits.

Enhanced Power Reliability

The battery energy storage system helps balance solar power fluctuations and provides continuous energy support for essential equipment, improving overall plant reliability.

Increased Renewable Energy Utilization

Solar power is prioritized for on-site loads, while excess electricity is stored for later use, maximizing renewable energy value.

Reduced Long-Term Energy Costs

The combination of solar generation and battery storage reduces dependence on conventional energy sources and improves long-term energy efficiency.

Improved Energy Independence

With microgrid operation capability, the system enhances energy resilience and helps industrial facilities maintain stable operation under unstable grid conditions.

SunWell Energy: Supporting Global Commercial and Industrial Energy Storage Applications

SunWell Energy is a professional lithium battery energy storage manufacturer specializing in:

  • Residential energy storage systems (ESS);
  • Commercial and industrial battery energy storage systems (C&I BESS);
  • High voltage battery storage solutions;
  • Large-scale renewable energy storage projects.
  • With advanced LiFePO4 battery technology, high voltage system architecture, and extensive international project experience, SunWell Energy provides reliable energy storage solutions for:
  • Industrial facilities;
  • Renewable energy microgrids;
  • Water infrastructure;
  • Commercial buildings;
  • Agricultural applications;
  • Utility-scale projects.

Through continuous innovation in battery technology and system integration, SunWell Energy is helping global customers achieve safer, smarter, and more sustainable energy management.

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