Romania Hybrid Energy Storage Project

Wenergy has successfully delivered a hybrid energy storage project in Romania, combining solar photovoltaic generation, battery energy storage, and diesel backup generation to provide a stable and resilient power supply for hospitality applications.

Designed to maintain uninterrupted comfort and service quality, the system prioritizes renewable energy utilization while ensuring continuous operation under both normal grid conditions and unexpected outages.

System Configuration

• Solar PV: 150 kW rooftop photovoltaic system

• Diesel Generator: 50 kW backup generator

• Energy Storage: 2 × 125 kW / 289 kWh ESS cabinets​

Project Overview

The hybrid architecture integrates PV, battery energy storage systems (BESS), and a diesel generator into a unified control framework. Intelligent energy management enables seamless switching between on-grid and off-grid operation, while the ESS acts as the primary balancing unit between solar generation, load demand, and backup power.

When battery capacity reaches predefined thresholds, the diesel generator is automatically activated to ensure uninterrupted power supply.

Key Benefits

• Maximized solar self-consumption, reducing grid dependence

• Seamless transition between grid-connected and islanded operation

• Automatic diesel generator dispatch for enhanced reliability

• Stable power supply for restaurants and SPA facilities during grid interruptions

Market Impact

By deploying a smart hybrid energy solution, the project delivers:

• Improved energy reliability and operational resilience

• Optimized energy costs through efficient resource utilization

• Enhanced comfort and guest experience

• Long-term sustainability benefits through reduced emissions

This Romania hybrid energy project demonstrates how integrated PV + storage + backup systems can meet the high reliability requirements of the hospitality sector while supporting a cleaner and more efficient energy future.