California ISO Renewables Watch: Tracks electricty for California as shown in the example pictures below (Aprl 21, 2019)

A brief overview of growth in renewable electricity, California's renewable energy targets, and the concept of "capacity factor"

Energy Information Administration:

• Electricity data browser (U.S. electricity data

• Net generation from renewable sources (U.S. monthly electricity data)

PV Performance and Reliability Links:

• PV system performance data – some with 1-minute resolution
• PV Performance Modeling Collaborative hosted by Sandia National Laboratories
• A Review of Practical Solar Information about Solar Performance, Buying, Reliability, and Maintenance

While our focus is on energy storage, there is no avoiding the fact that renewable energy generation will be heavily dominated by solar. Thus, PV performance and reliabiliy will have significant impact on storage requirements.