One-Stop Commercial & Industrial Energy Storage and Microgrid Solution

1. Project Background: Industrial Power Supply Challenges Under Weak Grids in Eastern Europe

In recent years, industrial development in Eastern Europe has continued to grow. However, the local public grid infrastructure remains outdated, with unstable power supply, large voltage fluctuations, frequent tripping, and unexpected outages. High industrial electricity costs and unstable power quality seriously affect continuous factory production. Manufacturing companies urgently need a commercial and industrial energy storage microgrid system with voltage stabilization, backup power, peak shaving, and multi-energy integration capabilities.

This Eastern European industrial customer customized a 1500KVA, 10MWh large-scale commercial and industrial energy storage project. The customer required a 1500VDC high-voltage DC architecture, and the system had to directly output 400VAC industrial voltage to power factory production loads. This customized non-standard requirement has a very high technical threshold in the energy storage industry.

Currently, mainstream low-voltage PCS solutions in the industry are limited by the 1000VDC technical bottleneck and cannot support 1500VDC high-voltage systems. The customer consulted several leading Chinese energy storage manufacturers in the early stage. Due to the high difficulty of high-voltage architecture compatibility, complex 400VAC direct output logic, and multi-power-source coupling control, many suppliers declined the project.

Core Customer Requirements in Eastern Europe

High-voltage architecture: 1500VDC high-voltage DC energy storage architecture for large-capacity microgrid clusters, reducing transmission losses and improving energy density and load capacity

  Power output: Direct 400VAC industrial standard voltage output without external transformers, supporting heavy industrial loads

  Energy structure: PV solar + diesel generator + grid hybrid microgrid system

  Operating conditions: Designed for weak grids in Eastern Europe with voltage stabilization, frequency control, and seamless on-grid/off-grid switching

  Expansion planning: Initial deployment of a 10MWh microgrid energy storage system with reserved expansion interfaces for future scaling to 15MW–30MWh

  Delivery requirements: One-stop microgrid solution including topology design, hardware integration, system integration, commissioning, and delivery

This 10MWh project is a highly customized industrial microgrid project. Unlike standard backup power systems, the project requires advanced capabilities in multi-energy coupling, on-grid/off-grid switching, weak-grid stabilization, high-voltage technology, power conversion, and system integration.

2. Technical Breakthrough: Self-Developed 690VAC Conversion Solution

To solve the technical challenge between the 1500VDC high-voltage architecture and 400VAC low-voltage direct output, the R&D team at GSL Energy carried out multiple rounds of electrical simulation, topology optimization, and system logic analysis.

Instead of using conventional low-voltage PCS solutions, GSL Energy adopted an innovative 690VAC high-voltage conversion architecture. This solution breaks through the traditional 1000VDC limitation and solves the industry challenge of direct industrial load supply from high-voltage energy storage systems.

Technical Advantages of the 10MWh Project

    Native support for 1500VDC high-voltage DC systems

    Suitable for 10MWh large-capacity energy storage deployment

    690VAC to 400VAC high-precision power conversion technology

    Standard industrial low-voltage power output

    Reduced circuit current and cable losses under high-voltage architecture

    Overall system efficiency improved by 2%–3%

    Compatible with PV solar systems, diesel generators, and utility grids

    Intelligent EMS algorithm designed for weak-grid environments in Eastern Europe

    Active voltage stabilization, anti-oscillation, and harmonic suppression functions

    Integrated containerized design for outdoor low-temperature environments

3. One-Stop Delivery: Intelligent Hybrid Microgrid System

GSL Energy provided a complete one-stop solution for the Eastern European customer. Unlike suppliers that only sell equipment, GSL Energy delivered a full-service process covering site survey, solution customization, structural design, equipment manufacturing, system integration, commissioning, and remote operation and maintenance.

Integrated Core Systems

    10MWh commercial and industrial battery energy storage system (BESS)

    1500KVA customized high-voltage PCS

    High-voltage PCS energy storage conversion system

    Distributed solar PV integration control system

    Diesel generator linkage start-stop control system

    Self-developed intelligent EMS energy management system

    Seamless on-grid/off-grid switching protection system

    Cloud-based remote monitoring and maintenance platform

Through the self-developed energy management strategy, the microgrid system realizes intelligent coordination between solar PV, diesel generators, and the utility grid.

    During daytime, solar power is prioritized to reduce electricity costs

    During low electricity price periods, the battery energy storage system charges

    During grid fluctuations or outages, the diesel generator and energy storage system switch automatically within milliseconds to ensure uninterrupted factory production

4. Customer Recognition: Professional Overseas Service and Long-Term Cooperation

During the Eastern European project, CEO Mr. Jim led a dedicated overseas technical team to provide 24-hour online support based on the local time difference.

Facing complex high-voltage topology and multi-energy control logic, the team continuously optimized the solution for five consecutive days and answered every technical question from the customer with patience and professionalism.

"CEO Mr. Jim and his team is very patient and professional.
GSL Energy is the best partner I have met on CESS solutions.
We will have 15MW-30MWh cooperation for next project orders."

The customer highly recognized the high-voltage customization capability and overseas service capability of GSL Energy. After the successful deployment of the 10MWh project, both parties confirmed future cooperation on 15MWh–30MWh energy storage expansion projects.

5. Project Summary: Supporting Industrial Energy Upgrades in Eastern Europe

The Eastern European 10MWh commercial and industrial microgrid energy storage project is another benchmark high-voltage energy storage project completed by GSL Energy in weak-grid regions.

The project successfully solved the industry challenge between the 1500VDC high-voltage architecture and 400VAC low-voltage direct power supply. It also verified the reliability of the 690VAC conversion solution in cold climates, unstable grids, and heavy industrial load applications.

With advanced high-voltage battery energy storage technology, complex microgrid integration capability, and professional overseas service, GSL Energy continues to expand its presence in Eastern Europe, Southeast Asia, and South Africa, providing global industrial customers with safe, stable, scalable, and cost-effective commercial and industrial energy storage solutions.

From the successful 10MWh deployment to future 30MWh energy storage cluster projects, GSL Energy remains committed to technology innovation and customer-focused service as a trusted long-term energy storage partner.

GSL ENERGY | High-Voltage Large-Scale Energy Storage Systems and Customized Microgrid Solutions

Professional energy storage design, R&D, integration, and delivery services for global commercial and industrial customers.