Question 1

What is independent power producer data?

Accepted Answer

Records describing non-utility generators and the markets they sell into: unit-level capacity, technology and ownership shares, plus the nodal prices, load and reserves those generators clear against. In this catalog the spine is Form EIA-860's census of every US plant at or above 1 MW, joined to the CAISO and PJM market tapes.

Question 2

Which dataset shows independent power producer market share?

Accepted Answer

Electric Power Monthly reports net generation by producer sector, explicitly splitting utilities, independent power producers, commercial and industrial generators by state and fuel. Electric Power Annual carries the same split across roughly 130 annual tables back to 1994, and Form EIA-860's owner sheet attributes jointly owned units share by share.

Question 3

How deep do the nodal price histories run?

Accepted Answer

CAISO OASIS holds a rolling window of roughly 39 months in the live interface, with historical downloads reaching back to 2016 across terabytes and about 1,150 rows per node-day of 5-minute prices. PJM's hourly real-time and day-ahead LMP archives reach well beyond two years by pricing node, hub, interface and transmission zone.

Question 4

How far back does the US generator census go?

Accepted Answer

Yearly Form EIA-860 files run from 2001 through the 2025 early release, each a 13-file bundle whose generator sheet carries 73 columns per unit. Superseded 860A and 860B forms extend the series back to 1990, and monthly 860M supplements have carried interim changes since July 2015.

Question 5

How much data is in one day of nodal prices?

Accepted Answer

A single PJM day of five-minute real-time LMPs across all nodes runs to millions of rows, which is why the slice totals hundreds of millions of rows across feeds. CAISO runs smaller per node - about 1,150 rows per node-day once each price splits into energy, congestion and loss components.

Question 6

Does the catalog cover markets beyond California and PJM?

Accepted Answer

The market-operational records center on CAISO - including its extended Western imbalance footprint - and PJM's RTO across all or parts of 13 states plus DC. National context comes from the three EIA products covering all fifty states, and the pooled State Energy Data System adds state statistics from 1960 onward for cross-market modeling.

Question 7

What arrives in a Datadory sample?

Accepted Answer

Real rows, cut to your question: a CAISO extract with decomposed 5-minute prices for the nodes you trade, a PJM feed shaped to your zones and interfaces, or Form EIA-860 filtered to the technologies and states you screen. The field dictionary and coverage statement ship with every sample, yours to test before anything recurring starts.

Independent Power Producers & Energy Traders Data: Nodal Price Tapes, Generator Censuses and Federal Electricity Statistics

The manifest

EIA Form EIA-860 — Annual Electric Generator Inventory

CAISO OASIS — Open Access Same-time Information System

PJM Markets & Operations (LMP, Load, Fuel Mix, Reserves)

EIA API Technical Documentation (v2 Routes & Facets)

EIA Electric Power Monthly

EIA Electric Power Annual

The lay of the water

Pick your catch

EIA Form EIA-860 — Annual Electric Generator Inventory

CAISO OASIS — Open Access Same-time Information System

PJM Markets & Operations (LMP, Load, Fuel Mix, Reserves)

EIA API Technical Documentation (v2 Routes & Facets)

EIA Electric Power Monthly

EIA Electric Power Annual

EIA State Energy Data System (SEDS)

Who fishes here

Frequently asked questions

See the rows before you commit

The sample tray

Start here — the deepest field dictionaries in the catalog

Wyoming Statewide Time-Stamped Oil and Gas Activity, 1900-2020

BTS T-100 Data Tables Query Interface

Open Payments (Physician Payments Sunshine Act)

USAJOBS API Data

Steel Plates Faults (UCI)

AviationStack Flight & Airport API