Large-scale Battery Storage Cooperation Forum
- Tackling Current Challenges Together and Developing Viable Solutions
The current dynamic growth of large-scale battery storage systems clearly shows that they are a key component of the energy transition. Their flexibility enables the integration of renewable energies, the provision of important system services and, in the long term, a reduction in grid operating and expansion costs. At the same time, the roll-out poses considerable challenges for stakeholders, including increasingly scarce grid capacities, complex grid connection processes, uncertainty about the impact on the grid and an unclear regulatory framework.
58 Companies – 4 Areas of Action – 1 Common Goal
To address these challenges, we have launched the Large-scale Battery Storage Cooperation Forum. Together with 58 companies – developers, marketers, grid operators and energy suppliers – we have developed practical and viable solutions. We were focusing on open, objective and scientifically sound dialogue. The proposed solutions are intended to serve as a catalyst for further discussions within the industry, involved associations and r egulatory decision‑makers.
Four Key Areas of Action
The forum focused on four key areas of action:
- Grid Connection Requests – Structuring procedures and making them more efficient
- Flexible Connection Agreements – Establishing more standardisation and transparency
- Grid Fees – Developing reasonable design options
- Co-Location – Identifying adaptation requirements and possible solutions
Methodological approach
The methodological approach comprises three phases.
- Structuring the debate:
To fully understand the facets of the challenges, individual background discussions were held with forum members and supplemented with targeted interviews from the broader FfE network (e.g., representatives from banks, legal experts). In addition, structured surveys were conducted to obtain a quantitative picture of stakeholder perspectives. - Foster understanding:
FfE developed science‑based analyses on various problem areas to enrich debates on critical topics with factual evidence. Furthermore, international experiences and solutions related to large‑scale storage deployment were examined in order to identify potential best practices. - Identifying solutions:
Based on the problem descriptions, quantitative analyses, and international research, FfE derived potential solution components, which were then discussed within the forum. The objective was not always to develop entirely new ideas, but also to refine existing approaches and discuss their opportunities and open questions. After a consultation phase, stakeholder feedback from the grid and storage sectors was gathered for each solution component; this feedback is presented at the relevant points in the report.
For each action area, an initial workshop was conducted to develop a shared understanding of the challenges, followed by a solution workshop to discuss concrete proposals. In total, 33 background discussions, eleven online workshops, and eight short analyses were carried out as part of the cooperation forum.
Results
The project work resulted in 18 solution components or impulses intended to stimulate further discussion on the grid integration of storage systems. In terminology describing storage behavior within the power system was discussed, and a proposal for suitable definitions was developed. In quantitative analyses, FfE also examined the impacts of various instruments on storage revenues.