We are the generation promoting solar energy development

As each territory is different, we develop the most efficient solar solutions on a local scale in Europe.

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Make the Sun shine

Become one of our stakeholders and help the world run on solar.

Our Process

We are accelerating the transition to a low carbon economy

We identify, design and drive project opportunities until they are technically and economically optimized, acceptable to all parties involved and ready to build.

Get in touch

Make the Sun shine

Become one of our stakeholders and help the world run on solar.

Land Identification

Land Identification

We track land that is suitable for the development of solar projects, assessing the potential human and environmental impact from day one.

Project Feasibility

Project Feasibility

Our experienced team analyses the feasibility of a project by checking grid connection possibilities, urban and environmental constraints, local acceptance, etc.

Design and Profitability

Design and Profitability

Our team connects all players involved to make sure our projects add value for each stakeholder.

Permits and Licences

Permits and Licences

We drive the entire project development and apply for all administrative, legal and technical permits needed to build and connect a solar project.

Illuminating Achievements

We have the unique ability to run several projects simultaneously and are proud of the positive impact they generate on a regional scale.

2.249,63 ha
Area
1.860,43 MW
Total capacity
1.230 MW
BESS
107 projects
Under development
528.147,97
Powered households

Our Expertise

We are solar development experts

Our mission is to promote solar energy development through expert know-how, to develop and identify the best natural, technical, human and commercial opportunities.

Get in touch

Make the Sun shine

Become one of our stakeholders and help the world run on solar.

Personal Approach

Committed and responsive: we focus on personalised connections to ensure close and agile relationships adding value for each stakeholder.

Pan-European Approach

We are accelerating the development of solar across Europe by identifying the most effective best practices and solutions in solar energy locally.

Innovative Data Approach

We provide optimised solar energy solutions using our own geographic information systems (GIS) to maximise the potential success of our solar energy projects from day one.

Our Team

Our Rays of Sunshine

    We work side-by-side on Europe’s shift from fossil-fuel dependency to renewable energy sources, ensuring a clean, affordable, sustainable life and economy for Europe.

    Josef Kastner

    Development is above all a human-oriented and collaborative activity that requires engagement.
    l am excited to share my experience with a motivated team to contribute collectively to a more decarbonated future.

    Chloé Durieux-Bodin

    Committed and Engaged Specialists

    Josef Kastner Partner & CEO, Vienna

    More than 19 years of dual experience as senior management of a solar EPC, and a solar developer across EU countries.

    Our rays of sunshine

    Our diverse team is multinational and present in France, Spain, Germany, Italy, Poland and Austria.

    Experts across 6 European Countries

    We are working across several locations in Europe with offices in Brindisi, Hamburg, Vienna, Lyon, Madrid and Warsaw.
    Our Locations

    Support from a pan-European Infrastructure Investor

    Marguerite, a European infrastructure fund backed by some of the leading financial institutions, provides us with solid financial backing, giving us the stability and resources we need to innovate, grow and deliver outstanding value for our customers and partners.
    Marguerite’s investment in Nexun benefits from support from the European Union under the InvestEU Fund.

    Latest news

    Highlight on our events

    News

    Nexun Featured in La République du Centre

    We’re happy to share that Nexun was recently featured in La République du Centre in an article about the agrivoltaic solar project being studied in Saint-Gondon. This project is a great example of how renewable energy and agriculture can move forward together. Read the full article here: https://www.larep.fr/saint-gondon-45500/actualites/limplantation-dune-centrale-solaire-agrivoltaique-a-letude_14708891/

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    News

    Nexun at Tech&Bio2025!

    🌱 Nexun will be exhibiting at Tech & Bio 2025 sharing the stand with Innov’Alliance ! 📅 Join us on the 24th and 25th of September 2025 in Bourg-lès-Valence to explore innovative and sustainable solutions shaping the future of agriculture. ✅ On the agenda: networking, demos, conferences and conversations with different experts. 📍 Come and […]

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    News

    Accelerating Europe’s Energy Transition

    We’re proud to announce that Marguerite has renewed and increased its equity investment in Nexun to fuel the continued growth of solar PV across Europe. With this support, Nexun will further expand its pipeline of over 1.2 GW of solar capacity and reinforce its presence in key European markets. This milestone strengthens our shared commitment […]

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    News

    Partner & CEO, Josef Kastner, Featured in Women in Solar Europe!

    Exciting news! Our Partner & CEO, Josef Kastner, was recently interviewed by Women in Solar Europe (WiSEu), where he shared his thoughts on diversity, fairness, and leadership in the solar industry. He discussed how bias, both conscious and unconscious, still affects hiring and promotions – and why real leadership should always be about talent, not […]

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    News

    Exciting News: Nexun Featured in Interview with Marguerite!

    We’re thrilled to share that our CEOs, Chloé Durieux and Josef Kastner, were recently interviewed by Marguerite to talk about Nexun’s growth and future plans in the renewable energy sector. Over the past two years, we’ve made significant progress, from onboarding over 1 GW of solar and battery storage projects to expanding into multiple European […]

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    News

    Nexun Featured on Conversations in Cleantech Podcast!

    We’re proud to announce that Josef Kastner (Partner & CEO) and Chloe Durieux (Partner & CDO) recently joined the Conversations in Cleantech podcast. In this insightful conversation with hosts Jessica Pearce and Tom Briscoe, they discuss the evolving role of renewable energy in Europe’s future. The episode covers everything from the challenges of scaling clean […]

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    Make the Sun shine

    Become one of our stakeholders and be part of the solar generation.

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