Renewable energy plays a big role in combatting climate change. Solar energy innovation ecosystems are important. In this context, the EU-funded SolarHub project will strengthen connections between five Greek and Turkish solar energy innovation ecosystems. Specifically, it will co-develop a Hub Strategy and a Joint Strategic Research and Innovation Agenda. By implementing a diverse set of complementary interventions, it will engage industry, government, research institutes and the public to support research and accelerate commercialisation. The project will also implement joint research activities and develop four pre-designs of diverse solar energy solutions. To maximise its impact, SolarHub will create relevant research strategies, networking and training opportunities for stakeholders, and promote synergies between research infrastructures.