What the new EPO-EIC technology insight tells us about photovoltaics innovation

A joint technology insight report produced by the European Patent Office’s Observatory on Patents and the European Innovation Council was published on 16 July 2025. The analysis examines patenting across a broad set of photovoltaic technologies over five decades. It combines patent statistics with expert interpretation to map recent trends in materials, device architectures, system management and application areas. The report is intended to inform policy makers, investors and technology managers, and to identify where innovation is concentrated and where risks remain.

Headline numbers and the dataset

Key aggregate figures from the report are straightforward but require careful reading. The authors identified roughly 340 000 inventions in the scope of the study for the period 1974 to 2023. About 70 000 of those are international patent families or IPFs, meaning patent filings that include at least two jurisdictions or an international (PCT) filing. The bulk of inventions in the dataset relate to device-level technologies, but the report highlights strong recent growth in materials, in system management and in application-specific uses.

Core trends the data reveal

The report documents two overarching dynamics. First, photovoltaics innovation expanded dramatically from the late 1990s through about 2012. Device-related inventions dominated that growth. Second, since about 2012 patenting strategies shifted. Filings concentrated in the Chinese national system rose steeply, while the number of IPFs fell. This does not mean innovation stopped. Instead it reflects a change in where applicants seek protection, influenced by market structure, manufacturing concentration and policy support.

The report also documents shifts inside technology groups. Device-level work historically accounted for the largest share of inventions. At the start of this decade almost half of inventions were device-related, but applications, materials and management have been growing faster recently. Some specific technologies have exhibited exceptional dynamism. Perovskite and inorganic-organic hybrid materials, passivated contacts and AI-enabled monitoring and diagnostics show high relative growth rates from small bases.

What the technology sub-areas show in more detail

The EPO analysis divides photovoltaics into four sub-areas. Each shows distinct dynamics and policy implications.

Examples and illustrative innovations

The report pairs statistics with patent-level exemplars. A few representative themes are worth highlighting for their practical implications.

Geography, applicants and the European position

The report underscores how patenting strategy is shaped by where manufacturing and commercial demand are concentrated. Filings shifted strongly toward China after 2012. If one looks only at IPFs, the top 20 applicants for 1990–2023 are dominated by Japanese firms followed by the United States and Republic of Korea, with Germany and France represented. However many major Chinese actors are prominent in the overall family counts because they mainly file domestically.

Europe’s strength lies not so much in commodity-scale module manufacturing today but in specialised deployment, system integration and applied research. The report highlights European comparative advantages in agrivoltaics, rooftop and building integration and in research output from universities. European startup and university activity in photovoltaic patenting has accelerated recently. Universities with notable invention volumes include institutions in the United Kingdom, France, Switzerland and Germany, while startup activity was historically highest in Germany, France, Switzerland and Sweden. Regional academic and startup hotspots in Europe include southern England, the Paris region, the Upper Rhine area, the Lake Geneva region and Madrid.

Policy context and responsible scaling

The report situates the technical findings inside a policy landscape that includes international climate agreements and EU strategies. The Paris Agreement and subsequent national commitments created demand signals that helped scale early markets. In the EU, REPowerEU and the European Solar PV Industry Alliance are explicit attempts to accelerate deployment and to reduce strategic dependencies. Horizon Europe and EIC instruments fund R&D, prototype and scale-up work.

The report notes the policy trade-offs. Public instruments such as feed-in tariffs, grant programmes and procurement accelerated early deployment. But rapid market scale-up combined with global competition created winner-take-most manufacturing dynamics. That in turn concentrated production in China. EU policy now focuses on supply chain diversification, standards, circularity and industrial scale-up. The report also stresses the need for standards and testing that make new materials, such as perovskites, acceptable for long-term deployment.

Implications, caveats and what to watch next

The EPO-EIC report is rich with patent-based evidence but it also underlines limits of the data and the need for context when using patent statistics to infer commercial capability or market power. Patents measure inventive activity and protection strategies. They do not, by themselves, measure manufacturing capacity, product quality or commercial uptake. The shift to Chinese-only filings after 2012, for example, is an instructive reminder that national filing practices can mask a country’s true innovative weight in IPF-based rankings.

For innovation managers and policy makers the report implies pragmatic priorities. Invest in pilot manufacturing for promising materials such as perovskite tandems while running parallel reliability and standards programmes. Expand recycling pilots and design-for-recycling incentives. Protect nascent EU manufacturing through targeted scale-up finance rather than broad subsidies that are economically inefficient. Finally support university spinouts and startups to bridge the valley of death between lab results and scalable production.

Short glossary of technical terms used in the report

Concluding perspective with a cautiously sceptical tone

The EPO-EIC technology insight offers a high-resolution, patent-based map of where inventive activity in photovoltaics has been concentrated and where it is accelerating. The findings confirm known dynamics. Device innovation drove the first wave and remains important. Materials such as perovskites and tools such as AI-enabled maintenance are now the most rapidly growing areas by percentage terms. The rapid shift toward Chinese national filings after 2012 should caution anyone trying to read international patent lists as a direct proxy for global innovation leadership. Europe’s path is not to replicate commodity-scale module production overnight. Instead Europe can focus on its comparative advantages in deployment integration, standards, circularity and specialised value chains, while using targeted industrial policy and public-private investment to close the scale-up gap for high-potential technologies.

The report is useful because it pairs quantitative patent metrics with sensible technology groupings and policy context. It is less useful if read as definitive evidence of who is winning the photovoltaics race without considering where firms choose to file and why. For decision makers the most actionable takeaways are to defend supply chain resilience, fund pilot manufacture and standards work, expand module recycling pilots, and improve support to translate university and startup inventions into industrial processes.

Where to read the source and follow up

The full EPO technology insight report Advances in photovoltaics and the EIC press notice were published in July 2025. Readers should consult the EPO Observatory on Patents and the EIC/EISMEA webpages for the full report, annex methodology, patent-query definitions and the primary data used for the charts. The report includes an annex describing the patent retrieval and classification approach and notes limits and caveats about the data.