On Tuesday, 30 June 2026, we hosted our webinar, 'Europe's next BESS wave: where will growth come from next?'. The session gathered pan-European market experts, including Jörn Richstein (Aurora Energy Research), Jan Fousek (AKU-BAT CZ), and Sebastiaan Groenhuijsen (ion Ventures), to map out the future of European grid-scale energy storage. This article summarizes the core data points, financial realities, and localized execution strategies shared during the presentations. For those who want to review the complete presentations and detailed slide decks, the full recordings are available on our dedicated resource page.
Key takeaways
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Variable renewable energy capacity in Europe is projected to expand by 151% by 2050, expanding the requirement for flexible storage systems.
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The near-term European pipeline for grid-scale energy storage has reached 122 GW, with conservative estimates projecting a 70% to 80% realization rate by 2030.
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Markets like Greece offer the highest potential returns with project internal rates of return exceeding 13%, while smaller markets like Portugal and Ireland stabilize above 11%.
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Grid constraints and speculative application pipelines present significant execution risks, requiring developers to form strong relationships with local partners.
European power grids are experiencing a massive expansion of variable renewable capacity alongside a 32% decline in conventional thermal generation by 2050. This structural shift requires an unprecedented scale of flexible power technology to balance electricity supply and grid demand. During our recent webinar, market intelligence specialists, local industry leaders, and asset developers shared detailed insights into the market dynamics, project economics, and policy shifts shaping the deployment of Battery Energy Storage System (BESS) assets across Europe.
The macroeconomic forces driving European energy storage
Aurora Energy Research maps out the long-term investment case for battery storage through several clear market trends. First, variable renewable capacity is set to rise 151% between 2026 and 2050, dominated largely by solar PV and wind generation. Concurrently, traditional baseload flexibility is decreasing as thermal generation faces a steady contraction, policy-driven coal phase-outs, and long-term economic pressures on gas-fired plants.
At the same time, total annual power demand in Europe is expected to climb 58% by 2050. This expansion is driven by the electrification of household heat, data centers, road transport, and green hydrogen production. While hydrogen presents some long-term downside risks, the rapid rise of data center demand adds an immediate requirement for continuous power solutions.
The commercial viability of BESS has been historically aided by falling capital expenditures, including a 52% drop in total battery system costs over the last five years. However, future cost reductions through 2030 are projected to be much more moderate, slowing to a rate of 5% to 10%. This stabilization occurs because centrally mass-produced battery cells now represent a smaller share of total project budgets compared to highly localized Engineering, Procurement, and Construction (EPC) soft costs, local development fees, and grid connection expenses. In the near term, developers are even seeing quoted EPC prices rise by 10% due to domestic supply consolidation, value-added tax adjustments, and technical quality premiums.
High-return markets and pipeline realities
In its pan-European assessment of 28 distinct storage markets, Aurora Energy Research ranks Germany, Great Britain, and Italy as the most attractive destinations for utility-scale battery investments, heavily supported by total market size. Concurrently, eastern European nations like Romania and Bulgaria have entered the top 10 rankings.
When analyzing pure project economics, smaller national markets frequently present superior revenue conditions. For example, Greece delivers the highest Internal Rate of Return (IRR) in Europe, with project returns exceeding 13% for standard or co-located configurations entering operations in 2028 or 2029. This performance is achieved despite a more moderate total addressable investment volume of €5 billion to €10 billion through 2050. Similarly, Portugal and Ireland maintain highly attractive IRRs above 11%, supported by favorable localized revenue streams and the ongoing opening of wholesale balancing markets.
Across the entire continent, the announced near-term project pipeline for grid-scale batteries has ballooned to 122 GW. However, paper pipelines do not automatically translate into operational capacity. Experts anticipate a realistic pipeline completion rate of 70% to 80% across Europe by 2030, with a significant volume of early-stage proposals constrained by extensive grid queues and capital deployment limitations.
Navigating localized execution risks: the Czech case study
The practical realities of navigating European grid systems are clearly visible in Czechia, a market experiencing an unprecedented volume of grid connection requests. By the end of 2025, Czechia had connected 2,549 MWh of cumulative battery storage capacity. This historical footprint was dominated heavily by the residential sector at 78%, followed by Commercial and Industrial (C&I) installations at 12% and utility-scale projects at 10%. Recent political shifts and the discontinuation of residential subsidies have redirected investor focus toward large-scale, standalone assets.
Standalone utility storage development was significantly accelerated by the implementation of the Lex RES III energy law, effective October 2025, which established public interest status for energy storage and eliminated historical double-charging tariffs on battery power injection. This regulatory clarity triggered an immediate boom in applications, resulting in over 250 GW and 500 GWh of connection requests submitted.
This massive wave of speculative proposals has exceeded the available capacity of local ancillary services by 300 times. Consequently, the Czech Energy Storage Association (AKU-BAT CZ) projects that only 2% to 3% of this requested pipeline, equating to approximately 5 GW to 8 GW, will be successfully realized and connected to the grid by 2030.
The long-term commercial viability of these upcoming utility projects remains heavily dependent on a proposed New Network Tariff Structure (NTS) slated for 1 January 2027. This framework seeks to provide steep tariff discounts for battery operations, though it faces intense opposition from domestic Distribution System Operators (DSOs) and anti-renewable political groups. As ancillary service markets saturate, future returns must be built on sophisticated revenue stacking, merchant flexibility, algorithmic power trading, and cross-border power arbitrage within the shared German-Czech-Austrian balancing zone.
Strategic developer priorities for long-term project bankability
For international developers like ion Ventures, scaling clean energy storage requires bridging the critical gap between early site origination and long-term institutional project finance. Achieving sustainable returns requires moving beyond basic project design to focus on the entire operational asset life cycle. This approach centers on a data-driven evaluation model to grade potential target markets rigorously according to scalable size, local deliverability, policy stability, and a clear path to investability.
To navigate the complex differences in language, local administration, and grid codes across various borders, developers must secure top-tier local partners from inception. Partnering with established domestic organizations and participating actively in national industry associations provides immediate access to shifting legislative updates and regulatory working groups. Proactive risk management across separate financial, development, construction, and operational metrics remains the absolute prerequisite for keeping institutional investors engaged and bringing high-quality assets to full commercial status.
Connecting local networks: the Solarplaza BESS seminar series
To help you establish the local partnerships and regulatory insights required to navigate these market dynamics, we are introducing a new event format to our lineup. The Solarplaza BESS seminar series will focus specifically on the localized challenges and commercial returns of Europe's next storage wave.
These focused gatherings will take place across the four key countries highlighted during the webinar:
Each seminar is structured to connect local grid operators, national policymakers, and international asset developers to turn speculative application pipelines into operational projects. You can see the full schedule, review the growing speaker lineups, and plan your attendance on our event agenda page: https://www.solarplaza.com/events/.
