Romania 3.5MW/7.3MWh Industrial Energy Storage: High-Capacity Grid Integration

Project Overview

In a major industrial park in Romania, Anengji has successfully delivered a large-scale 3.5MW/7.3MWh Commercial & Industrial (C&I) energy storage solution. The system is powered by 28 units of ECO-E261LP storage inverters (PCS) and 4 POC grid-connection cabinets. Strategically integrated with rooftop solar PV and Romania’s Time-of-Use (ToU) tariff structure, this project focuses on energy arbitrage and maximizing PV self-consumption. It significantly slashes operational costs, boosts green energy utilization, and provides critical stability for Eastern Europe’s high-renewable power grid.

Detailed Operational Scenarios

1. Energy Arbitrage (Strategic Peak-Shaving)

The Romanian electricity market features a significant price spread, where peak hour rates (08:00–11:00 and 18:00–21:00) can be 2.8 times higher than nighttime off-peak rates (00:00–06:00). The system charges during low-cost intervals and discharges during expensive peaks to support heavy manufacturing loads.

• Financial Result: Annual electricity savings exceeding €350,000, with a total payback period within 5 years.

2. High-Efficiency PV Self-Consumption

The park is equipped with a 4.2MWp rooftop solar array. Previously, peak midday generation exceeded local demand, leading to significant energy curtailment. Our lithium ion battery energy storage captures this excess green energy in real-time and dispatches it during evening peaks or overcast conditions.

• Environmental Impact: Increased the self-consumption rate from under 45% to over 88%, maximizing clean energy value and grid independence.

Core Technical Advantages

• A Benchmark in Large-Scale C&I Storage: As one of the leading 3.5MW/7.3MWh installations in Romania, this project demonstrates Anengji’s engineering prowess in large-scale system integration and grid dispatch.
• High-Density, High-Efficiency Conversion: Each ECO-E261LP PCS unit delivers 125kW with a conversion efficiency of ≥98.5%. Together with POC cabinets, the system ensures millisecond-level response and full compliance with Transelectrica (Romanian TSO) technical requirements.
• Autonomous Intelligence & Remote O&M: Featuring the proprietary Anengji EMS, the system automatically optimizes charging/discharging strategies. It supports multi-cluster control, remote diagnostics, and unmanned operation to minimize O&M costs.
• Modular Architecture for Scalability: The standardized unit architecture includes pre-allocated expansion space, allowing the system to scale seamlessly to 10MWh+ in alignment with future facility growth.
• End-to-End Safety & Reliability: The battery system is UL 9540A certified, featuring liquid-cooling thermal management and multi-level electrical protection. It is engineered to withstand Romania’s climate extremes (-25°C to +45°C).