Purpose: This paper explores the strategic challenges of transitioning to renewable energy in various EU countries while reducing greenhouse gas emissions. Methodology/Approach: The research utilises case studies to analyse national policies, stakeholder engagement, and the EU's role, particularly through the European Green Deal. Findings: Germany faces grid stability issues, Denmark excels in public-private partnerships, and Spain effectively utilises its solar resources. Research Limitations/Implications: Future research could investigate the scalability of these strategies in other regions. Practical Implications: The findings offer practical insights for regions transitioning to low-carbon energy systems. Social Implications: Inclusive stakeholder engagement is essential for minimising public opposition to renewable energy projects. Originality/Value: This research contributes novel insights to the literature on renewable energy transitions by integrating leadership, policy, and innovation strategies within a comparative, multi-country European framework.