--- title: "Forecast subscription details" slug: "forecast-subscriptions-details" description: "Explore Solargis Forecast subscription tiers, data types, and features, including advanced forecasting models for solar and PV parameters." updated: 2026-06-03T13:21:04Z published: 2026-06-03T13:21:04Z canonical: "kb.solargis.com/forecast-subscriptions-details" --- > ## Documentation Index > Fetch the complete documentation index at: https://kb.solargis.com/llms.txt > Use this file to discover all available pages before exploring further. # Forecast subscription details **In this document** You will learn what services, data types, and features are included in every Solargis Forecast subscription tier. ## Forecast data parameter specifications The following table details all parameters available in Solargis Forecast services. It specifies the units and source of each parameter. > **Tip**: You can collapse the navigation menu and table of contents for more comfortable table view. | Parameter | API parameter | Unit | Type | Source | Forecast Basic | Forecast Professional/ Enterprise | Forecast: Historical Period | Forecast: Portfolio Aggregation | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Global Horizontal Irradiation | GHI | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Direct Normal Irradiation | DNI | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Diffuse Horizontal Irradiation | DIF | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Global Tilted Irradiation for fixed-tilt PV modules * | GTI | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Global Tilted Irradiation for PV modules on trackers * | GTI | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | GHI high estimate (10 % probability of exceedance) | GHI_UNC_HIGH | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | GHI low estimate (90 % probability of exceedance) | GHI_UNC_LOW | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | GTI high estimate (10 % probability of exceedance) | GTI_UNC_HIGH | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | GTI low estimate (90 % probability of exceedance) | GTI_UNC_LOW | kWh/m2, Wh/m2, W/m2 | Solar | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Cloud identification quality flag | CI_FLAG | - | Solar | Solargis | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Sun Altitude (Elevation) Angle | SUN_ELEVATION | ° | Solar | Solargis | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Sun Azimuth Angle | SUN_AZIMUTH | ° | Solar | Solargis | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Clearness index | KT | - | Solar | Solargis CMV | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Incidence angle of direct irradiance * | INC | ° | PV | Solargis | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Photovoltaic Output for fixed-tilt PV modules * | PVOUT | kW, kWh | PV | Solargis CMV, NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | Photovoltaic Output for PV modules on trackers * | PVOUT | kW, kWh | PV | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | PVOUT high estimate (10 % probability of exceedance) * | PVOUT_UNC_HIGH | kW, kWh | PV | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | PVOUT low estimate (90 % probability of exceedance) * | PVOUT_UNC_LOW | kW, kWh | PV | Solargis CMV, NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | PV module temperature * | TMOD | °C | PV | Solargis | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Tilt of inclined surface * | TILT | ° | PV | Solargis | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Aspect of inclined surface * | ASPECT | ° | PV | Solargis | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Air Temperature at 2 meters | TEMP | °C | Climate | NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Wet Bulb Temperature | WBT | °C | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Dew Point Temperature | TD | °C | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Wind Speed | WS | m/s | Climate | NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Wind Direction | WD | ° | Climate | NWP | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Wind Gust | WG | m/s | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Wind speed at 100 meters | WS100 | m/s | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Wind direction at 100 meters | WD100 | ° | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Atmospheric Pressure | AP | hPa | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Relative Humidity | RH | % | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Precipitable Water | PWAT | kg/m2 | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Precipitation Rate | PREC | mm/h | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Water equivalent of accumulated snow depth | SDWE | kg/m2 | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Water equivalent of fresh snowfall rate | SFWE | kg/m2/hour | Climate | NWP | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | | Potential hail risk with hail size ≥ 1 inch (~2.5 cm) within 50 km radius** | HAILRISK25MM | % | Climate | HRRR | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Potential hail risk with hail size ≥ 1.5 inch (~3.8 cm) within 50 km radius** | HAILRISK38MM | % | Climate | HRRR | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | | Potential hail risk with hail size ≥ 2 inch (~5 cm) within 50 km radius** | HAILRISK50MM | % | Climate | HRRR | | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-HPZBWX2D.png) | | *******US CONUS territory only* * *This parameter needs a PV system defined in the request, at least in a minimal setup as follows:* ```xml       ``` ## Forecast model details The spatial resolution and update rate of Solargis Forecast for a particular location and time horizon depends on the forecast model used. Solargis Forecast uses several forecasting models – our proprietary Cloud Motion Vector (CMV) model, and four different Numerical Weather Prediction (NWP) models. These models are summarized in the table below. As a general statement, nowcasts and short-term forecasts for solar and PV parameters are derived from the Solargis CMV model, with sub-hourly update rates, and ~4 km spatial resolution. Forecasts for meteorological parameters for any time horizon, solar and PV parameters beyond approximately the next 3 hours are derived from a blend of NWP models, with an update rate of 6 hours, and at least ~13 km spatial resolution. In the continental USA, the forecast for the next 2 days is available with an hourly update rate and approximately 3 km spatial resolution. The spatial resolution of the final delivered data (solar and PVOUT parameters) is improved by the Solargis downscaling process using horizon shading. We use the near-global [SRTM terrain database](/v1/docs/terrain-models), which has a spatial resolution of 90 m (3 arc-seconds). This step is particularly important in areas with complex terrain, where the effects of horizon shading become more noticeable in the data. | Model | Coverage | Temporal coverage up to | Spatial resolution | Update rate | | --- | --- | --- | --- | --- | | CMV model by Solargis | Global | Approx. 3 hours | 0.033° (~4 km) | 5 minutes in the contiguous USA 10 minutes in the Americas and East Asia/Pacific 15 minutes in Europe, Africa, and Asia | | HRRR by NOAA | Continental USA (CONUS) | 18 hours (D+0) 48 hours (D+2) every 6 hours | 0.033° by 0.033° (approx. 3.5 × 3.5 km) | 1 hour | | ICON by DWD | Global | 60 hours (D+2) | 0.1 by 0.1° (approx. 11 × 11 km) | 6 hours | | ICON EU by DWD | Europe | 60 hours (D+2) | 0.0625° by 0.0625° (approx. 7 × 7 km) | 6 hours | | IFS by ECMWF | Global | 60 hours (D+2) | 0.1 by 0.1° (approx. 11 × 11 km) | 6 hours | | IFS Ensemble by ECMWF | Global | 60 hours (D+2) | 0.25° by 0.25° (approx. 28 × 28 km) | 6 hours | | GFS by NOAA | Global | 14 days (D+14) | 0.1 by 0.1° (approx. 11 × 11 km) | 6 hours | ## Forecast subscriptions - technical details | | Forecast Basic | Forecast Professional | Forecast Enterprise | Forecast: Historical Period | Forecast: Portfolio Aggregation | | --- | --- | --- | --- | --- | --- | | Geographical coverage | Land surface and coastal seas between latitudes 60°N to 56°S and between 60°N and 65°N in Scandinavia and America (Figure 1) | | Temporal resolution (time step) | Hourly | Up to 5 minutes | Up to 5 minutes | Up to 5 minutes | Up to 5 minutes | | Temporal coverage for Forecast data | Today to D+7 | Today to D+14 | Today to D+14 | Past two complete calendar years for horizons H+0, H+1, H+2, H+3 D+0, D+1, D+2 | Today to D+14 | | Data update rate for up to approx. 3 hours ahead | Six hours | Up to 5 minutes for PVOUT, GHI, DNI, DIF, GTI (including clear sky and uncertainty variants - Figure 1) Six hours for all other parameters One hour for all other parameters in CONUS | Up to 5 minutes for PVOUT, GHI, DNI, DIF, GTI (including clear sky and uncertainty variants - Figure 1) Six hours for all other parameters One hour for all other parameters in CONUS | n/a | Up to 5 minutes (Figure 1) | | Data update rate for data beyond approx. 3 hours ahead | Six hours | Six hours One hour in CONUS up to D+2 | Six hours One hour in CONUS up to D+2 | n/a | Six hours | ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-6GT8R2KF.png) ***Figure 1:****Geographical coverage of Solargis Forecast data*