Sources: caiso.com Today's Outlook (fuel source)
``` [Full Screen Chart](../download_chart/CAISO/caiso_fuel_mix.html) ## Description System-wide CAISO generation by fuel group, presented as five tabs: - **Daily** - daily-mean stacked area (US/Pacific days): the trend view, with the high-frequency intraday cycle averaged out. - **Average Day** - the mean 24-hour profile by hour of day (US/Pacific): the diurnal view - midday solar peak, evening gas ramp, and the battery charge/discharge cycle. - **Small Multiples** - one panel per fuel group on a shared timeline, so each fuel's behavior reads without stacked-baseline distortion. - **Heatmaps** - date × hour-of-day grids for solar, natural gas, and batteries. The battery map uses a diverging scale (blue charging, red discharging); the duck curve is visible as the daily color bands. - **15-Min Detail** - the trailing six months of 15-minute means, for zooming into specific events. (Downsampled from the 5-minute feed: the browser repaints the whole stack on every zoom step, and the full-window 5-minute version made that repaint lag.) The thirteen source fuels fold into seven stacked series - Natural gas, Solar, Wind, Hydro (large + small), Nuclear, Imports, and Other (geothermal, biomass, biogas, coal, other). Battery output is kept separate throughout because it is signed: negative when charging, positive when discharging. **Formulas Used:** N/A. **Data Cleaning Information:** No values are altered - every view is a plain mean of the 5-minute feed over its bucket (day, hour of day, date x hour, or 15-minute interval). The only other processing is grouping: the thirteen source fuels are combined into the seven stacked groups listed above, and batteries remain their own series because their output is signed (negative while charging, positive while discharging). ## Notes - The 15-Min Detail tab is in UTC; daily, average-day, and heatmap views bucket by US/Pacific so the diurnal shapes line up with local time. - Solar dips slightly negative overnight (station load at the plants). - Stacked and line series can be toggled via the legends. ## Chart Specs | Chart Name | Generation by Fuel | |------------------------|------------------------------------------------------------| | Chart ID | caiso_fuel_mix | | Topic Tags | Generation, Grid Context | | Data Series Start Date | | | Data Frequency | 5-minute (Aggregated views: daily / hourly) | | Observation Period | | | Lag in Data Release | | | Data Release Timing | | | Seasonal Adjustment | | | Units | MW | | HTML Chart | [HTML](../download_chart/CAISO/caiso_fuel_mix.html) | ## Dataframe Manifest | Dataframe Name | CAISO Fuel Mix | |--------------------------------|--------------------------------------------------------------------------------------| | Dataframe ID | [caiso_fuel_mix](../dataframes/CAISO/caiso_fuel_mix.md) | | Data Sources | caiso.com Today's Outlook (fuel source) | | Data Providers | CAISO | | Links to Providers | https://www.caiso.com | | Topic Tags | Generation, Grid Context | | Type of Data Access | | | How is data pulled? | src/pulls/pull_caiso_fuel_mix.py via the open-source gridstatus library | | Data available up to (min) | | | Data available up to (max) | | | Dataframe Path | data\opensource\caiso_fuel_mix.parquet | **Linked Charts:** - [CAISO:caiso_fuel_mix](../../charts/CAISO.caiso_fuel_mix.md) ## Pipeline Manifest | Pipeline Name | Project-Lab-Energy-Weather-Natgas-Quanto-CAISO | |---------------------------------|--------------------------------------------------------| | Pipeline ID | [CAISO](../../index.md) | | Lead Pipeline Developer | Brian Nguyen | | Contributors | Brian Nguyen, Claire Kim | | Git Repo URL | | | Pipeline Web Page | Pipeline Web Page | | Date of Last Code Update | 2026-08-27 10:08:05 | | OS Compatibility | Windows, Linux, macOS | | Linked Dataframes | [CAISO:caiso_lmp_day_ahead_hourly](../dataframes/CAISO/caiso_lmp_day_ahead_hourly.md)