ACME Solar Holdings Limited has announced the commissioning of a 143 MW and 481 MWh Battery Energy Storage System (BESS) in the state of Rajasthan. The project has been developed through the company’s subsidiaries and represents the first phase of a larger energy storage development programme planned by the company.

The commissioning of this large-scale storage system highlights the growing importance of battery energy storage technology in India’s renewable energy sector. As solar and wind power generation expands rapidly across the country, energy storage systems are becoming essential for maintaining a stable and reliable power supply.

The installed capacity of 142.67 MW and 481.49 MWh forms the first phase of the company’s planned 585 MW and 2011.24 MWh battery storage capacity across multiple special purpose vehicles.

This milestone demonstrates the company’s commitment to strengthening renewable energy infrastructure and supporting India’s transition toward clean and sustainable power generation.

Role of Battery Energy Storage Systems in Power Grids

Battery Energy Storage Systems play a critical role in modern electricity networks, especially in systems that depend heavily on renewable energy sources.

Renewable energy sources such as solar and wind power generate electricity based on natural conditions. Solar plants produce electricity during daylight hours while wind farms depend on wind availability. This variability can sometimes create mismatches between electricity supply and demand.

Battery storage systems help address this challenge by storing electricity when generation is high and releasing it when demand increases.

The BESS facility commissioned by ACME Solar in Rajasthan is designed to perform this exact function. The system will:

• Store electricity during periods of low demand or surplus generation
• Supply stored electricity during peak demand periods
• Improve grid reliability and operational efficiency

By performing these functions, energy storage systems reduce energy wastage and help ensure that renewable power can be used more efficiently across the electricity grid.

Integration with Inter State Transmission System

The newly commissioned battery energy storage facility in Rajasthan has been connected to the Inter State Transmission System (ISTS).

This transmission network enables electricity generated in one region to be transmitted to other parts of the country. Integration with ISTS ensures that stored energy can be distributed across multiple states depending on demand conditions.

During the initial phase, the storage system will operate on a merchant basis. This means that the company will sell electricity in the open market depending on price signals.

The BESS facility will generate revenue by taking advantage of the difference between electricity prices during peak demand hours and non peak demand hours.

When electricity demand is low and prices are lower, the system will store energy in batteries. Later, during peak demand hours when electricity prices rise, the stored energy will be discharged into the grid.

This approach allows power producers to optimise revenue while also helping maintain grid balance and stability.

Future Integration with Renewable Energy Projects

The company has stated that the Rajasthan BESS facility will eventually be integrated with Firm and Dispatchable Renewable Energy projects.

Firm and Dispatchable Renewable Energy, often referred to as FDRE, is a concept that combines renewable energy generation with storage technology to ensure continuous and reliable power supply.

Once integrated with FDRE projects, the battery energy storage system will operate under long term Power Purchase Agreements lasting up to 25 years.

This integration will help provide:

• Consistent renewable electricity supply
• Better grid stability and reliability
• Enhanced utilisation of solar and wind resources

Such projects are expected to play a major role in helping India achieve its long term renewable energy capacity targets.

ACME Solar Renewable Energy Portfolio

ACME Solar Holdings Limited is one of the leading renewable energy developers in India with a rapidly expanding portfolio of projects.

The company currently has a diversified energy portfolio of about 8071 MW covering various renewable energy technologies.

This portfolio includes:

• Solar energy projects
• Wind power projects
• Energy storage systems
• Hybrid renewable energy plants
• Firm and dispatchable renewable energy projects

Out of the total portfolio, the company has 2966 MW of operational contracted capacity along with 481 MWh of operational battery energy storage capacity.

This combination of renewable generation and storage solutions allows the company to offer reliable and sustainable electricity supply solutions.

Renewable Energy Projects Under Construction

In addition to operational projects, ACME Solar is currently developing a significant number of renewable energy projects under construction.

The company has around 5105 MW of renewable energy capacity currently under development.

This includes approximately 16.5 GWh of battery energy storage installations, which will be deployed in phases across different states in India.

The company has also signed Power Purchase Agreements for approximately 3304 MW of renewable energy capacity.

These projects are expected to significantly expand the company’s renewable energy generation and storage capabilities over the coming years.

Importance of Battery Storage in Renewable Energy Expansion

Battery storage technology has become a key component in the global transition toward renewable energy.

Countries around the world are investing heavily in energy storage because it helps overcome one of the biggest challenges associated with renewable power generation.

Solar and wind power are clean and sustainable energy sources, but their output can fluctuate depending on weather conditions. Battery storage systems provide the ability to store excess energy and supply it when required.

Large scale storage installations such as the one commissioned by ACME Solar can help:

• Improve electricity grid stability
• Reduce power shortages during peak demand
• Increase efficiency of renewable power plants

As India continues to increase renewable energy capacity, the role of battery storage systems will become even more critical.

In House Engineering and Project Development

ACME Solar has developed strong technical capabilities through its in house Engineering Procurement and Construction division and Operations and Maintenance teams.

These teams manage the entire lifecycle of renewable energy projects, including:

• Project design and planning
• Construction and commissioning
• Long term operation and maintenance

Having in house capabilities allows the company to execute projects more efficiently and maintain high operational performance standards.

The company reports strong operational performance across its projects, with high capacity utilisation levels and stable operating margins.

Supporting India Renewable Energy Goals

India has set ambitious goals for expanding renewable energy generation as part of its long term climate and sustainability commitments.

The country aims to significantly increase the share of renewable energy in its overall electricity mix over the coming decades.

Large scale investments in solar power, wind power, hybrid renewable projects and battery storage systems are essential to achieving these targets.

Battery energy storage systems such as the one developed by ACME Solar will help ensure that renewable energy generation remains reliable, efficient and available whenever electricity demand rises.

This will help strengthen the national grid while also reducing dependence on fossil fuels.

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