Brief overview of GIS services at the Penn Libraries
https://guides.library.upenn.edu/mapping 

Penn Libraries' Research Data and Digital Scholarship
https://www.library.upenn.edu/help-with/research-data-digital-scholarship

Earth Week Data Jam (April 18 – 22)
This Earth Week, join Penn Libraries' Research Data and Digital Scholarship team (and friends) for a week full of workshops on data curation, analysis, visualization, and experimentation techniques using datasets related to environmental issues and the natural world.
https://www.library.upenn.edu/about/exhibits-events/earth-week-data-jam

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Visualizing Renewable Energy Data
https://www.nrel.gov/bioenergy/data-tools.html

Rooftop Photovoltaic Technical Potential in the United States
This dataset contains estimates of the number of small buildings (<5000 sq.ft) and the percentage of those buildings that have at least some area that is suitable for rooftop PV, for all zip codes in the contiguous US. 
https://data.nrel.gov/submissions/121
Methodology Documentation: 
https://www.nrel.gov/gis/publications.html
https://iopscience.iop.org/article/10.1088/1748-9326/aa7225/pdf

NREL's Biomethane GIS Data
This dataset (shapefiles) contains estimates of the methane generation potential by county from the following biogas sources: landfills, animal manure; wastewater treatment; and industrial, institutional, and commercial organic waste (IIC).
https://www.nrel.gov/gis/biomass.html
https://www.nrel.gov/docs/fy06osti/39181.pdf

NREL's Solid Biomass GIS Data
This dataset (shapefiles) contains information about the biomass resources generated by county in the United States. It includes the following feedstock categories: crop residues, forest residues, primary mill residues, secondary mill residues, and urban wood waste.
https://www.nrel.gov/gis/biomass.html

States and counties boundary 
https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html

ArcGIS online webmap link
https://upenn.maps.arcgis.com/apps/mapviewer/index.html?webmap=3737a36bfacf4f50ba0a77aeca4a10a6

NREL's PVWatts Calculator
This online tool allows homeowners, small building owners, installers and manufacturers to easily develop estimates of the performance of potential PV installations.
https://pvwatts.nrel.gov/