[olivermarks]

Suparna Ray, the independent statistics and analysis EIA person writing about Utility scale photovoltaic and thermal here appears to be using EIA forms like this as the basis for her article. (She's listed as a contact on this form but it is hard to find info on who she is).

https://www.seia.org/sites/default/files/EIA-860.pdf

It would be good to see the actual data.

[janalsncm]

Is this what you’re looking for?

https://www.eia.gov/electricity/data/eia860m/

[olivermarks]

I think that is another generator survey form, not Utility scale photovoltaic and thermal energy generation battery storage.

This is an area I'm interested in. HECO in Hawaii are arguably the most advanced in battery storage. https://www.hawaiianelectric.com/documents/clean_energy_hawa...