As municipalities, states and federal mandates push for carbon reductions, fossil free buildings and a clean grid emerge as critical pathways. Achieving this on any building poses serious challenges; however, when evaluating large buildings, the challenges become even more difficult. This panel of experts has extensive experience designing, testing and monitoring both new construction and existing buildings attempting to achieve high performance, low-carbon goals. The presenters will present case studies that showcase the current design challenges, supply stream deficiencies and research that is being conducted to overcome the challenges to full electrification in large buildings in cold climates.