Battery energy storage systems (BESS) had significant deployments and a reduction in supply chain problems in 2023, making it yet another record-breaking year for BESS-even if safety concerns persisted in making news.
This year, as the technology develops further and energy storage becomes more ubiquitous-that is, from a novelty to a necessity-there will be more emphasis placed on safety even while ESS continues to progress. The way BESS is used going forward will likewise change by 2024.
The year of safety at scale
If there's one thing the energy storage sector has learnt in 2023, it's that battery safety needs more consideration.
Several occurrences in 2023 demonstrate that maintaining battery safety is more difficult than it first appears. Complex electrochemical systems make up batteries. They demand safety precautions above and beyond what is required by law.
Their safety will be seen as an inherent component essential to the scalable and long-term development of battery technology, rather than as merely another box to be checked. This paradigm shift acknowledges that the margin for error decreases with increasing diversity and extensive use of batteries. There is a need for a more thorough approach to safety.
BESS providers and operators will emphasise operational safety more as part of an all-encompassing strategy, stressing the value of ongoing monitoring from commissioning to end-of-life (EoL) of batteries.
This method emphasises how battery systems are dynamic and that safety is a constant need rather than a static attribute. Battery systems are becoming more and more linked with advanced monitoring systems and predictive maintenance technologies, which allow for the real-time tracking of performance indicators and the early identification of possible safety hazards.
By doing this, battery systems' dependability is increased and their operational lifespan is prolonged, guaranteeing efficiency and safety during use.
Essentially, battery safety will be a major area of concern as the energy storage sector transitions from an early adopter phase to a more mature application of BESS. This is due to the fact that running batteries in an effective and scalable manner depends heavily on battery safety and reliability.
From sodium-ion to solid-state
This year, BESS will witness cutting-edge technological developments in addition to safety improvements. Lithium-ion batteries have dominated the BESS market, but the demand for longer-duration storage-which lithium cannot currently be used for safely or economically-will allow promising non-lithium technologies to become more prevalent.
Applications that need longer storage times-especially more than eight hours-will use sodium-ion batteries more and more. This is because there is a need for more affordable storage options.
The features of sodium-ion technology, which provides a balance of cost-effectiveness, security, and an appropriate energy density for long-duration storage, are what are driving this change. Because of its unique chemistry, it is especially useful in fixed applications where weight and space constraints are less important than in mobile applications.
Because sodium can be harvested almost anywhere in the world, sodium-ion batteries are far less expensive than lithium-ion batteries.
Solid-state batteries will become a more expensive choice on the market at the same time. Because their solid electrolytes don't catch fire, solid-state batteries are known for their exceptional performance, which includes a better energy density and improved safety features.
But because of their increased cost, solid-state batteries are seen as a luxury option in the battery market-at least until technology advances. Production of solid-state batteries is costly since new supply chains and advanced manufacturing techniques are needed.
Solid-state batteries will continue to be in high demand despite their price, especially in applications where safety and performance are critical and cost is less of a concern.
This trend demonstrates how the battery market is becoming more diverse. Various technologies are being tailored for particular use cases, providing options that range from economical to performance-focused.
The application-led evolution of BESS
One of the most significant advancements in 2024 will be large-scale batteries' ability to run for longer periods of time. Certain systems have a maximum operating duration of four hours. This length extension is a significant advancement in energy storage technology that will improve the grid's ability to integrate renewable energy sources and increase supply reliability.
In industries where energy needs are high yet dispersed over longer time periods, there will be a specific need for lower power density, long-duration energy storage (LDES) applications. This covers manufacturing procedures, extensive integration of renewable energy sources, and grid stability in regions with sporadic power supplies. The emphasis on long-duration storage is part of a larger movement in the energy sector towards more dependable and varied energy sources.
The technological landscape of BESS will change in tandem with these developments. Known as "revenue stacking," operators are currently investigating new revenue streams.
This entails taking advantage of the diverse range of functions that storage systems may do to engage in different market services such as frequency regulation, load shifting, peak shaving, and black start services.
However, there is an increase in operational complexity as a result of this variety of revenue sources. To effectively oversee these diverse revenue streams, one must possess advanced control systems, a comprehensive comprehension of market dynamics, and an understanding of how varying load profiles affect battery degradation. Because of all of this, using BESS assets is more complicated than it has ever been.
A number of significant themes will shape the development of BESS in 2024, including the persistence of safety as a top priority, the commercialization of non-lithium technologies, the lengthening of battery life for large-scale systems, and the investigation of new revenue streams through intricate operational plans. These developments underline the BESS market's dynamic character as well as the continuous innovation and adaptation in reaction to shifting consumer demands and industry opportunities.