Project Overview

Wenergy successfully delivered Phase II of a grid-focused Battery Energy Storage System (BESS) project in Riga, Latvia, deploying a 3MW / 6.17MWh liquid-cooled energy storage solution designed for frequency regulation and grid stabilization.

The system consists of 2 × 3.086MWh integrated liquid-cooled ESS units, combined with a 3MW Power Conversion System (PCS) and step-up configuration. The project is scheduled for installation in December 2025.

Key Specifications:

• Location: Riga, Latvia

• Total Energy Capacity: 6.17MWh

• Rated Power: 3MW

• Configuration: Integrated ESS + PCS architecture

• Application: Frequency regulation

This deployment builds on previous project phases and further strengthens grid flexibility in the Baltic region.

Benefits

The Riga Phase II system was engineered to meet the operational requirements of modern European grids, where renewable energy penetration continues to rise.

High-Response Frequency Regulation
The 3MW power capacity enables rapid charge and discharge cycles, supporting real-time grid frequency stabilization.

Advanced Thermal Management
Liquid cooling ensures uniform temperature control, improving battery performance consistency and extending lifecycle under continuous cycling conditions.

Integrated System Architecture
By combining ESS and PCS into a streamlined configuration, the project reduces installation complexity, improves system efficiency, and enhances operational reliability.

Scalable Design
The modular structure allows future capacity expansion in response to evolving grid demands.

Customer Value

For the project owner, the deployment delivers measurable operational and strategic value:

• Enhanced grid compliance with frequency regulation requirements

• Improved system reliability and performance stability

• Long-term lifecycle cost optimization through efficient thermal control

• Future-ready infrastructure adaptable to increased renewable integration

The solution provides both immediate grid-balancing capability and long-term asset value.

Industry Impact

As renewable energy generation expands across Europe, frequency volatility and grid balancing challenges are intensifying.

The Riga Phase II project demonstrates how grid-oriented, liquid-cooled BESS solutions can effectively support frequency regulation while maintaining high efficiency and reliability.

This case highlights a scalable model for Baltic and broader European markets, where energy storage is becoming essential infrastructure for grid stability, renewable integration, and energy transition objectives.

By delivering high-performance, integrated energy storage systems, Wenergy continues to support the modernization and resilience of power networks worldwide.