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Green flexibility technologies

As the renewables sector grows, the demand for energy storage and balancing solutions increases. We are committed to create a flexible energy system, which would effectively utilise and manage 100% green capacities in the short, medium and long terms.

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Battery energy storage systems

One of the most important tasks in the energy sector is to balance electricity production and consumption. And one of the most effective ways of balancing them is to store surplus energy. Battery energy storage systems (BESS) can store the produced surplus electricity and use it when it is needed the most. They help ensure the network stability even during fluctuations in the solar or wind generation. This solution contributes to a cleaner, more reliable and sustainable energy future.

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Projects

Kelmė battery energy storage system

Location pin decoration Lithuania

  • Project under construction

  • 147 MW power; 295 MWh storage capacity

The battery energy storage system is being developed near Kelmė wind farm, located in central Lithuania. The project with 147 MW power and 294 MWh storage capacity is expected to commence commercial operations in 2027.

Mažeikiai battery energy storage system

Location pin decoration Lithuania

  • Project under construction

  • 45 MW power; 90 MWh storage capacity

The battery energy storage system is being developed near Mažeikiai wind farm, located in the northern part of Lithuania. The project with 45 MW power and 90 MWh storage capacity is expected to commence commercial operations in 2027.

What are the benefits of BESS?

Balanced electricity supply

BESS help balance electricity production and consumption by preventing a sudden surplus or deficit of energy.

Effective utilisation of renewable energy

BESS enable the efficient utilisation of solar and wind energy, even when electricity is not being produced (e.g., when the sun is not shining and/or there is no wind).

Reliable and stable supply of energy

BESS reduce dependency on fossil fuels and ensure reliable supply of energy.

How do battery energy storage systems work?

Battery energy storage systems enable the storage of electricity coming from the grid or from electricity generation sources, such as solar or wind farms. In principle, the systems are similar to batteries, only the energy accumulation takes place on a much larger scale.

The stored energy can be fed back into the grid when the demand increases (for example, when city residents return home after work) or when the energy production decreases (during the dark hours of the day, in the case of solar farms).

BESS are particularly important when developing green energy projects as the amount of energy produced depends on natural conditions, the time of day and other factors that are not always predictable.

How do BESS work?

Surplus electricity is used to charge BESS
Let's image two scenarios:
On a sunny day, solar farms generate more electricity than consumers need.
At night, electricity consumption decreases, but wind turbines continue to spin and generate large amounts of energy.
In both cases, BESS can store excess electricity without letting it go to waste.
BESS are discharged when there's energy deficit
The demand for electricity can fluctuate for different reasons, such as:
Electricity demand can spike due to various reasons, for example, in the evening, when everyone returns home and turns on the lights, TVs and household appliances at around the same time.
Electricity production decreases when there is no wind or sun.
In both cases, BESS feed the previously accumulated energy back to the grid, thus ensuring a stable electricity supply and helping prevent power outages.