The aim of this Work Package 6 (WP6) report is to describe and analyze insights from Interreg North Sea WaterWarmth demonstration pilots. Specifically, WP6 examines the pilots' innovation and governance arrangements that help implementation and scaling of aqua thermal energy (AE) systems in real-world contexts. The work is therefore primarily based on lessons learned through a mixed methods approach with the Interreg North Sea WaterWarmth project pilots. To help address the shortage of knowledge on innovation of AE systems, this report builds on frameworks previously used in WP6 work (see Deliverable 6.1; Hoppe et al., 2024) where a mapping of theoretical frameworks and a typology to analyze governance of AE and other heating systems was performed. Particularly, we are applying three of the approaches and theoretical frameworks from Deliverable 6.1 from various scholarly backgrounds. For example, the multi-level perspective (MLP) and Strategic Niche Management (SNM) have a background in Science-and Technology Systems studies, Transition Studies and Evolutionary Economics, while Governance Arrangements (GA) has its roots in Governance and Policy Studies. As the focus of this report is on bottom-up niche level developments, we use concepts from SNM involving voicing and shaping of expectations, network formation, and learning. The pilots are implemented under societal conditions and hence also influenced by the existing heating regimes. Therefore, we address challenges and tensions, which we assume indicates incumbent regime influence that often hinders AE innovation development applying the MLP. Finally, we are interested in what role governance, and more specifically, regulation plays in pilots. This refers to organization authority and legitimacy, the role of government, and policy instruments like regulations, permit systems, and/ or subsidies.