PJM · Generation
PJM fuel mix
What generated across PJM each hour, by fuel — gas, nuclear, coal, hydro, wind, solar, storage, oil and the rest — with each one's share of the total. Posted fifteen minutes past the hour and kept by PJM indefinitely.
pjm-fuel-mixhourly, :15 past · 1h rows10 entitiesWhat is in it
- Updates
- hourly, :15 past · 1h rows
- Entities
- 10 entities — GAS, NUCLEAR, COAL…
- Source timezone
- US Eastern — every timestamp Dryos serves is UTC
- Coverage
- 3 September 2026 to now
- Rows held
- 3,610
- Primary key
- iso, fuel, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- OutputMW
Generation from the category over the hour. Storage runs negative while charging.
gen_mw - Share of total
The category's fraction of the hour's generation, 0–1.
share
Columns
Exactly what a request answers with, read from the API rather than written here.
| Column | Type | Description |
|---|---|---|
| interval_start_utcrequired | timestamp | Start of the interval, UTC, read from PJM's own UTC column.e.g. 2026-09-09T12:30:00Z |
| isorequired | string | Publishing ISO.e.g. PJM |
| fuelrequired | string | Fuel category as PJM names it, upper-snake: COAL, GAS, NUCLEAR, HYDRO, WIND, SOLAR, STORAGE, OIL, MULTIPLE_FUELS, OTHER_RENEWABLES.e.g. GAS |
| gen_mwrequired | number | Generation from this category over the hour, MW.e.g. 46698 |
| sharerequired | number | This category's fraction of the hour's total generation, 0–1, as PJM publishes it (three decimals).e.g. 0.447 |
| renewablerequired | boolean | Whether PJM counts the category as renewable.e.g. false |
| source_published_at_utc | timestamp | When PJM published the row, UTC. |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-09-09T12:35:12Z |
Read it
Public, read-only, no key and no sign-up. Relative times stay relative, so a URL keeps working.
The newest rows
curl "https://api.dryos.ai/v1/datasets/pjm-fuel-mix/query?node=GAS&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/pjm-fuel-mix"Full parameters — bucketing, aggregation, filters and search — are on the API reference.
Ask an agent
The same stream through the Model Context Protocol, so Claude, ChatGPT, Cursor or any MCP client can query it directly.
claude mcp add --transport http dryos https://api.dryos.ai/mcpThen ask:
What has Output been at GAS over the last 24 hours, and when did it peak?
Setup for every client is on the MCP server page.
Changes to this collector
A change in the collector is a change in the data. Anyone reading a step in a series is owed the day it moved under them.
- 2026-09-09
First collected, from PJM Data Miner 2.
Non-member API access was granted on 2026-09-09. Reconciled against live responses the same day: schema, nulls, primary key, value bands and row counts all passed, and the energy identity and the node naming rule were checked row-for-row against the day-ahead feed and the pricing-node master.
How this stream is checked
- Pulled straight from PJM Data Miner 2 · gen_by_fuel — no reseller in between — and compared against that file before it is served.
- Null means the source did not report it — never zero.
- A reading lands hourly, :15 past; the interval timestamp is the start of the interval, in UTC.
- PJM's Eastern Prevailing Time observes daylight saving; its rows carry UTC as well. Every timestamp Dryos serves is UTC.
Related streams
- PJM wind outputPJM
Wind output across the whole of PJM, a SCADA reading every fifteen seconds, kept at that grain.
every 15 s · 15s rows1 entitypjm-wind-gen - PJM solar outputPJM
Metered utility-scale solar output across the whole of PJM every five minutes.
every 5 min · 5m rows1 entitypjm-solar-gen - PJM wind and solar forecastPJM
PJM's hourly wind forecast for the next 46 hours, re-issued every ten minutes, and its hourly solar forecast for the next four days — utility-scale and behind-the-meter separately — re-issued hourly.
every 10 min, two days ahead · 1h rows3 entitiespjm-wind-solar-forecast - PJM five-minute wind and solar forecastPJM
PJM's wind and solar forecasts for the next six hours in five-minute steps — solar utility-scale and behind-the-meter separately — re-issued every ten minutes.
every 10 min, six hours ahead · 5m rows3 entitiespjm-wind-solar-forecast-5min - Fuel mixERCOT
Output by fuel type across the interconnect, every five minutes.
every 5 min · 5m rows8 entitiesercot-fuel-mix - MISO fuel mixMISO
Output by fuel category across the Midcontinent footprint every five minutes — coal, gas, nuclear, wind, solar, storage, imports and other.
every 5 min · 5m rows8 entitiesmiso-fuel-mix