Renewable energy finance and building energy technologies: Trends, case studies, and innovations in north America

Ezealigo, Christian K and Ezealigo, Precious O (2025) Renewable energy finance and building energy technologies: Trends, case studies, and innovations in north America. World Journal of Advanced Research and Reviews, 26 (1). pp. 1566-1577. ISSN 2581-9615

This paper explores the transformative trends in renewable energy finance and building energy technologies across North America between 2022 and 2025. Amid aggressive net-zero targets and strong policy incentives, the region has seen a dramatic shift in investment patterns—clean energy spending now significantly outpaces fossil fuel investment. The study highlights key developments in financial instruments such as green bonds and corporate power purchase agreements (PPAs), along with the expanding role of public-private partnerships and government tax incentives. Simultaneously, building technologies have advanced with the proliferation of smart meters, grid-interactive efficient buildings (GEBs), battery storage, heat pumps, and net-zero energy construction. These innovations are not only reducing emissions and energy costs but also reshaping how buildings interact with energy systems. The paper includes North American case studies illustrating municipal-private retrofit financing, integrated smart homes, and net-zero campuses. Collectively, these developments signal a shift toward integrated finance-tech-policy ecosystems capable of accelerating the energy transition and achieving climate resilience at scale.