A recent study by SolarPower Europe (SPE) reveals that accelerating the deployment of solar photovoltaic (PV) and battery storage across the European Union could reduce electricity system operating costs by approximately 49% by 2030, compared to 2025 levels.
According to the report Solar+: An EU pathway to achieve renewable targets, price affordability, and energy security, modeled by Rystad Energy, a more ambitious "Solar+" scenario would cut annual system costs by €55 billion. This represents an additional €20 billion in savings over the current business-as-usual trajectory.
Under this accelerated pathway, the EU's battery storage capacity would expand to 171 GW/598 GWh by the end of the decade, supporting greater grid flexibility and reducing reliance on fossil fuels. Wholesale electricity prices could decline by more than 10%, while price volatility in select markets could drop by 42%.
The report emphasizes that integrating renewables with storage not only lowers costs but also enhances energy security. However, SPE notes that even this high-ambition scenario falls short of Europe's long-term storage needs, calling for stronger policy action to unlock flexibility at scale.
Source: SolarPower Europe (SPE), May 2026
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