• Dagong ESS

What Is the Future of Long-Duration Energy Storage (LDES)?

What Is Long-Duration Energy Storage?

Long-duration energy storage (LDES) refers to systems capable of storing electricity for 8+ hours to several days, providing solutions for:

• Renewable energy intermittency

• Grid stability during peak demand

• Industrial and utility backup

• Decarbonization of energy systems

While lithium-ion batteries dominate short-duration applications, LDES may involve flow batteries, compressed air, molten salt, or hybrid systems for extended duration.

Types of LDES and Complementary ESS

LDES can be implemented in combination with conventional lithium-ion systems:

• Modular Li-ion ESS (100–372 kWh) for short-duration smoothing

• Containerized ESS (3.35–5 MWh) for multi-hour energy shifting

• Emerging LDES solutions such as flow batteries or hybrid storage

• Integration with solar, wind, and microgrid systems

Dagong ESS modules provide the modularity and scalability to pair with LDES technologies for optimized energy management.

Features Driving LDES Adoption

Key technological features:

• Multi-hour to multi-day energy delivery

• Modular and scalable architecture

• Advanced thermal management (air-cooled & liquid-cooled)

• Long cycle life and low degradation

• Integration with renewable forecasting and smart grid control

Containerized systems like 5MWh air-cooled ESS can serve as the backbone for LDES applications, ensuring reliable supply over extended periods.

Applications of LDES

Typical applications include:

• Grid-scale renewable energy smoothing

• Industrial demand management over multiple hours/days

• Remote microgrid or islanded communities

• Backup for critical infrastructure

• Energy trading and arbitrage

Modular systems like 215–372 kWh liquid-cooled ESS are used for short-duration stabilization, while 3.35–5 MWh containerized ESS provides long-duration support in hybrid configurations.

Price of LDES and Hybrid Systems

Pricing depends on:

• Duration of storage (hours vs. days)

• Total energy capacity (kWh → MWh → GWh)

• Cooling method and modularity

• Integration with renewables and monitoring systems

Project-specific quotations are provided based on deployment scale and operational requirements.

How to Select LDES Solutions?

Considerations include:

• Required storage duration and energy output

• System modularity and expansion capability

• Compatibility with existing lithium-ion ESS modules

• Cooling method suitable for local climate

• Integration with renewable energy forecasting and grid controls

Dagong ESS provides modular 100–372 kWh systems and containerized 3.35–5 MWh ESS, ideal for hybrid configurations with LDES technologies.

How Long Will LDES Systems Last?

Typical performance:

• 8000+ cycles for lithium-ion modules

• 15–20 years operational life

• Low degradation even under extended-duration cycling

These lifespans ensure reliable long-duration storage for industrial, utility, and hybrid renewable projects.

The Supplier of LDES Solutions

Key supplier capabilities:

• Support hybrid LDES + Li-ion systems

• Modular and containerized ESS for scalable deployment

• Advanced thermal management and safety features

• Global project engineering and commissioning support

Dagong ESS offers 100–372 kWh modular systems and 3.35–5 MWh containerized ESS, fully compatible with emerging LDES applications worldwide.

If you are interested in long-duration energy storage (LDES) system products, please contact Dagong ESS,Email: sales@dagongess.com