Portugal Águeda Project | 500kW/1075kWh On/Off-Grid Energy Storage System

Case introduction

• Under the bright sun of Águeda, Portugal, Hua Power’s 500kW/1075kWh user-side on/off-grid energy storage project for a local manufacturing enterprise has officially been commissioned.
  This project not only marks Hua Power’s further expansion into the European solar-plus-storage market but also demonstrates how our customized solutions effectively address key industrial pain points — high energy costs and strict power reliability requirements — setting a practical example for small and medium-sized commercial and industrial (C&I) energy storage applications.

  

  ---

  Project Overview: Tailored Energy Solution for 24-Hour Production

  Our client is a manufacturing factory with about 300 employees, operating 24 hours a day with an average load of 150 kW. The factory’s high electricity costs had long been a major operational burden.
  Although it had an existing 200 kW PV plant, system limitations prevented it from fully utilizing clean energy.

  To address this, Hua Power designed an integrated AC/DC on/off-grid solar + storage solution, centered around a 500 kW/1075 kWh energy storage system.
  Through AC coupling, the solution integrates the existing 200 kW PV system with an additional 400 kW PV array, forming a unified “PV + ESS” structure.
  This enables self-consumption, grid export, and off-grid backup, meeting the factory’s round-the-clock energy demand.

  

  ---

  Technical Highlights: Reliable Performance Built on Core Strengths

  

  Hua Power’s solar + storage system delivers robust technical advantages that precisely match industrial application scenarios:

  1. Dual On/Off-Grid Operation: Prioritizes PV power utilization when grid-connected; automatically switches to off-grid mode during grid failure to ensure uninterrupted 24-hour production.

  2. Highly Integrated Design: Combines PV, MPPT, and transformer modules into a single system — reducing costs, saving space, and shortening installation time.

  3. Flexible Expansion and Strong Adaptability: Supports PV capacity expansion and handles 100% unbalanced loads, maintaining stable power under fluctuating demand.

  4. Intelligent Control Core: Equipped with Hua Power’s self-developed BMS and EMS systems, optimizing charging and discharging in real time — PV powers the load and charges the battery during the day, while stored energy supplies power during peak hours or at night, minimizing grid dependence.

  This versatile solution can also be extended to PV-diesel hybrid microgrids and off-grid island scenarios, realizing true “one solution, multiple applications.”

  

  ---

  Customer Benefits: Cost Reduction and Green Energy in Harmony

  After commissioning, the factory achieved a significant upgrade in its energy structure and operational efficiency:

  • Maximized Renewable Utilization: Full consumption of 600 kW PV generation, reducing fossil fuel reliance and cutting carbon emissions by hundreds of tons annually.

  • Lower Electricity Bills: Avoids peak tariffs and achieves substantial monthly cost savings, offering long-term economic advantages.

  • Enhanced Power Reliability: The STS and maintenance bypass design ensures uninterrupted power even during maintenance or grid fluctuations, safeguarding production continuity.

  

  ---

  Empowering Global Green Energy Transformation

  Rooted in China and expanding globally, Hua Power is committed to enhancing the efficient and secure use of green energy.
  Through customized energy solutions and strong technological expertise, we provide reliable solar + storage services to customers worldwide.
  Moving forward, Hua Power will continue to deliver cost-effective and sustainable energy solutions, contributing to the achievement of global carbon neutrality goals.