William F. Holmgren

William F. Holmgren is an Assistant Research Professor at the University of Arizona, affiliated with the Power Forecasting Group and the Institute for Energy Solutions. His expertise centers on solar and wind power forecasting using regional weather models, satellite imagery, and ground sensors, alongside open-source software development for renewable energy applications. He holds a PhD in Physics from the University of Arizona (2013). Holmgren’s research emphasizes improving solar irradiance forecasts through advanced modeling, data assimilation, and tool development, notably contributing to projects like pvlib Python and the Solar Forecast Arbiter.

His work integrates interdisciplinary approaches, combining atmospheric science with software engineering to address challenges in renewable energy systems. Key contributions include optimizing photovoltaic (PV) system modeling, enhancing satellite-derived irradiance algorithms, and developing frameworks for forecast evaluation. Holmgren is actively involved in community-driven open-source initiatives to advance solar energy research and operational forecasting tools.