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.
Make the Sun shine
Become one of our stakeholders and help the world run on solar.
As each territory is different, we develop the most efficient solar solutions on a local scale in Europe.
Become one of our stakeholders and help the world run on solar.
Our Process
We identify, design and drive project opportunities until they are technically and economically optimized, acceptable to all parties involved and ready to build.
Become one of our stakeholders and help the world run on solar.
We track land that is suitable for the development of solar projects, assessing the potential human and environmental impact from day one.
Our experienced team analyses the feasibility of a project by checking grid connection possibilities, urban and environmental constraints, local acceptance, etc.
Our team connects all players involved to make sure our projects add value for each stakeholder.
We drive the entire project development and apply for all administrative, legal and technical permits needed to build and connect a solar project.
We have the unique ability to run several projects simultaneously and are proud of the positive impact they generate on a regional scale.
Our Expertise
Our mission is to promote solar energy development through expert know-how, to develop and identify the best natural, technical, human and commercial opportunities.
Become one of our stakeholders and help the world run on solar.
Committed and responsive: we focus on personalised connections to ensure close and agile relationships adding value for each stakeholder.
We are accelerating the development of solar across Europe by identifying the most effective best practices and solutions in solar energy locally.
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
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 KastnerDevelopment 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.
More than 19 years of dual experience as senior management of a solar EPC, and a solar developer across EU countries.
More than 17 years of experience in developing renewable energy projects and leading development teams in France, across Europe, and in Latin America.
Our diverse team is multinational and present in France, Spain, Germany, Italy, Poland and Austria.
We are working across several locations in Europe with offices in Brindisi, Hamburg, Vienna, Lyon, Madrid and Warsaw.
Our Locations
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.
Producing electricity for 1.1 million European households:
2 GW installed renewable energy capacity
Actively invests in clean energy projects
4.100 GWh renewable energy produced
1MtCO2e/y greenhouse gas emissions avoiding
Latest news
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/
Read more🌱 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 […]
Read moreWe’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 […]
Read moreExciting 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 […]
Read moreWe’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 […]
Read moreWe’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 […]
Read moreBecome one of our stakeholders and be part of the solar generation.
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7 Rue de la République
69001 Lyon · France
Lothringerstraße 16,
Top IV/11
1030 Vienna · Austria
WeWork
Gerhofstraße 1-3
20354 Hamburg · Germany
c/o Monday Chamberí
Calle de Sta Engracia, 23, Chamberí,
28010 Madrid · Spain
No 8, Tytusa Chałubińskiego Str.
00-613 Warsaw · Poland
c/o Copernico
Via Altabella 17
40125 Bologna · Italia
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