On April 28, a sudden power blackout swept across Spain and Portugal. Within just five seconds, over 60% of power demand disappeared, plunging cities into chaos—subways stopped mid-route, traffic lights failed, and tens of thousands were trapped in elevators. The total economic loss? Estimated between €2.25–4.5 billion.

What went wrong?

At the time, 75% of Spain's electricity was generated by solar and wind power. However, when two large solar farms abruptly disconnected from the grid, the resulting imbalance triggered an automatic safety response that cascaded into a full-scale blackout.

The Vulnerability of Renewable-Heavy Grids

This incident exposed a structural weakness in power systems that rely heavily on intermittent renewables:

Intermittency: Solar and wind are weather-dependent, making their output unstable.

Lack of Storage: Without energy storage system to buffer fluctuations, even minor disturbances can ripple into large-scale failures.

Grid Interdependence: The collapse of cross-border connections, like the link to France, can magnify local failures into regional crises.

As Spain's Prime Minister Pedro Sánchez stated, “It's not a matter of nuclear vs renewables—it's about stability.” The blackout was not caused by green energy itself, but by the absence of a reliable energy storage safety net.

Dagong ESS: Powering the Future with Smart Energy Storage

Dagong ESS delivers advanced energy storage systems designed to stabilize power grids and enhance the reliability of renewable energy sources.

Why Choose Dagong ESS?

✅ Ultra-fast response time: Millisecond-level reaction to power gaps prevents voltage crashes.
✅ Built for resilience: 30-year lifespan with high performance in extreme heat and humidity.
✅ AI energy management: Smooths out supply fluctuations from renewables, optimizing grid performance.

Real-World Success: Dagong ESS in Action

China's Wind & Solar Sites: Reduced power curtailment rates by 80% through smart storage integration.

European Microgrids: Maintained continuous power supply for 72 hours during extreme weather events.

C&I Customers: Lowered energy bills and ensured uninterrupted operation with industrial-grade ESS.

Dagong ESS Product Portfolio

🔹 Industrial & Commercial Energy Storage Systems

Designed for factories, logistics centers, data centers, and more. These systems reduce electricity costs by peak shaving, provide emergency backup power, regulate voltage quality, and stabilize power usage.

🔹 Residential Energy Storage Systems

Perfect for homes and small businesses. Store excess solar energy during the day for use at night or during grid outages, improving self-consumption rates and energy independence.

Flexible Pricing & Customization

Dagong ESS offers pricing based on EXW (Ex Works) terms, with flexibility depending on system size, configuration, and volume. All products are equipped with high-performance BMS, ensuring safe, stable, and intelligent operation.

Contact us for a detailed quote or technical consultation tailored to your needs.

Partner with a Trusted Energy Storage Manufacturer

As a global provider of intelligent energy solutions, Dagong ESS is committed to delivering high-performance, long-lifespan, and smart energy storage systems. Whether you're managing a renewable power plant, running an industrial facility, or powering a home, we have the right solution for you.