Project Overview

• Location: Riga, Latvia
• Scale: 3MW / 6.17MWh
• Application: Frequenct regulation, grid stabilization
• Configuration: Integrated ESS + PCS architecture

Wenergy successfully delivered Phase II of a grid-focused Battery Energy Storage System (BESS) project in Riga, Latvia. The system consists of 2 × 3.086MWh integrated liquid-cooled ESS units, combined with a 3MW Power Conversion System (PCS) and step-up configuration. 

Solution Highlights

• 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 solution provides both immediate grid-balancing capability and long-term asset 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

Market 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.