02.2025
What are battery energy storage systems?

Battery storage or battery energy storage systems (BESS) are a means of storing excess renewable energy, especially that produced by wind and solar power, so that it can be deployed on days with less sun or wind, or when demand for energy is particularly high. Storing renewable energy makes for a more stable electrical grid.
How is energy stored?
Renewable energy is stored in large-scale battery storage systems, which are charged via the electricity grid or a connected power station. Later, the energy is then released or discharged back to the grid when there is increased demand.
Why do we need battery storage for the energy transition?
Developing battery energy storage systems (BESS) is essential for the energy transition as many sources of renewable energy are weather dependent. If we want to move to heavier reliance on clean energy sources, it’s necessary to have a reliable flow of electricity to the grid and have large and efficient reserves of energy storage in order to meet fluctuating demand.
One thing that cannot be compromised when it comes to the energy transition is security of supply. Deploying BESS ensures that there is energy available to be used when it really matters.
What are the challenges of battery storage?
When it comes to battery storage, several barriers hinder widespread deployment. One major challenge is the lack of standardization for battery systems, which raises concerns about the durability and safety of Battery Energy Storage Systems (BESS) when integrated into the grid. Additionally, there is limited data on the performance and failure rates of these systems, making it difficult to optimize them effectively.
These safety and performance uncertainties make it harder for stakeholders to confidently invest in developing BESS technology for future applications. Moreover, many stakeholders lack a clear understanding of how BESS can help alleviate grid pressure, further complicating its adoption.
How much battery storage do we need?
In the UK, as of 2024 we currently have 3.5GW of battery storage capacity. There is approximately 80GW capacity being planned for future installation.
The UK government has set targets of 30GW capacity by 2030 and 50GW capacity by 2050.
Globally, the total installed capacity of BESS stood at 45.4GW in 2023 and is set to increase to 372.4GW in 2030.
Find out more about our projects and platforms including the BESS pioneer Zenobe here.
You may also be interested in

JERA Nex, leading the energy transition
Satoshi Yajima, JERA Nex's chairman, explains why the launch of JERA nex was an exciting moment for the energy transition.

JERA Nex expands presence in US with 395MW solar farms acquisition from Lightsource bp

A new renewables company to transform the global energy system
