Steadymet, our proprietary power forecasting model

Steadymet enhances the accuracy of renewable energy forecasts by using a multi-model approach based on 20+ meteorological models.

SteadyMet, day-ahead power generation forecasts

Get accurate solar and wind forecasts for the next 15 days

Steadymet provides day-ahead and intraday energy forecasts for solar and wind farms, with a 15-day horizon.

Our proprietary technology combines over 20 numerical weather prediction (NWP) models to eliminates individual biases, ensuring unparalleled accuracy across all time horizons.

We also provide a full suite of forecast quantiles that measure uncertainty across all time horizons, enabling you to tailor your strategy to your risk tolerance and maximize the value of your renewable output in response to market conditions.

Steadysun Steadymet global horizontal irradiance (GHI) forecast on Steadyweb
Steadymet GHI forecast on SteadyWeb
Steadysun Steadymet 10m wind speed forecast graph on Steadyweb interface
Steadymet 10m wind speed forecast on SteadyWeb

Technical specifications of our renewable data

Forecast horizon

15 days

Update frequency

Up to 1 hour

Forecast time step

Up to 1 minute

Weather parameters

Power, GHI, DNI, DHI, GTI, temperature, wind speed & direction, humidity and more...

Global coverage

Get accurate solar forecasts anywhere in the world : forecasts by site, portfolio, city, region or country.

Technologies

PV, CSP, onshore, offshore

Data delivery

API, SFTP, etc.

Confidence intervals

Measure uncertainty through 11 quantiles (P00, P10, P20, …, P80, P90, P100)

Key benefits of SteadyMet

Highly accurate day-ahead solar and wind power forecasts

Best-in-class technology

We combine forecasts from 20+ established weather models with your real-time production data. Our AI eliminates biases and constantly optimizes accuracy, providing you with the most reliable forecasts on the market.

Relevant for micro-climates

An in-house regional model at very high spatio-temporel resolution (up to 1km), delivering accurate and reliable forecasts in areas where local effects are critical and where public regional weather models are unavailable.

Fully flexible data delivery

Customize your experience: specific weather parameters, update frequency tailored to your needs (up to 5 minutes), optimal time granularity, and data formats compatible with your systems (API, FTP, web interface).

Global coverage

Wherever your assets are located, our technology integrates a comprehensive set of global and regional models from the most reputable meteorological services (ECMWF, GFS, ICON, UK Met Office, etc.).

SteadyMet's forecast data sources

The multi-model approach at the core of our accuracy

As you know, Steadysun has developed an innovative aggregation technology that simultaneously leverages over 20 benchmark meteorological models worldwide (see map). And our system doesn’t just collect this data; it analyzes, compares, and merges it into a unified forecast of superior reliability.

This multi-model approach enables us to:

  • Eliminate biases inherent in each individual model.
  • Significantly reduce forecast errors through a compensation effect.
  • Optimize overall performance by leveraging the strengths of each data source.

As a result, we provide highly reliable power generation forecasts, i.e. intraday and daily wind forecasts, as well as intraday and daily solar forecasts.

World map with weather models used in SteadyMet
Multimodel weather forecasting sources
Animated Steadysun SteadyMet temperature forecast with and without quantiles
Example of Steadysun's SteadyMet temperature forecast showing forecast uncertainty with quantiles

Measure uncertainty

Probabilistic forecasts

Uncertainty is an integral part of weather forecasting. Go beyond traditional forecasting limitations with our probabilistic methodology.

Steadysun transforms meteorological uncertainties into a strategic asset by deploying 11 distinct quantiles that accurately chart all possible scenarios. This modeling of NWP distributions reveals the exact probability of each solar variation, enabling optimized risk management and highly profitable energy decisions.

Visualize your potential production and anticipate fluctuations with unmatched confidence, even in the most volatile conditions.

Local accuracy, global reach

High-definition resolution for tailored forecasts

For critical short-term forecasts (D and D+1), SteadyMet can be configured with the very high-resolution Weather Research and Forecasting (WRF) model (1km resolution), ensuring highly accurate weather forecasts and significantly improve our forecasts.

Our team of meteorologists and data scientists can implement and optimize the WRF model anywhere on the globe, ensuring optimal performance regardless of your assets’ location.

Ideal for accurately capturing local microclimates, this model excels in mountainous, coastal, island, or high-aerosol concentration regions.

Animated real-time WRF weather simulation by Steadysun
Example of Steadysun's real-time WRF weather simulation in action
IT server rack
Hosting and computation environment

AI-Powered precision

Enhancing accuracy with artificial intelligence

Our technology goes beyond the aggregation of weather models – it enriches them by processing terabytes of meteorological data daily from over 20 sources, integrating real-time Numerical Weather Prediction (NWP) forecasts, satellite observations, and ground measurements.

This robust data foundation, powered by machine learning and AI algorithms, allows SteadyMet to precisely adapt to your installations’ unique characteristics. It also enables real-time model optimization, dynamically adjusting each weather model’s contribution based on its regional and historical performance for unparalleled accuracy.

In this process, the expertise of our engineers and meteorologists is paramount: they supervise, interpret, and refine these automated analyses, ensuring you receive the most reliable forecasts.

Sign up for your 30-day free trial now!​​

Discover the best of SteadyWeb, our autonomous forecasting plateform. Optimize two plants free with Expert+ features – no commitment !

Aerial image of solar PV field

Our forecasting process

4 steps to day-ahead power generation forecasts

Earth with meridians, thermometer and battery

Data acquisition

Solar panel and wind turbine illustration

Modeling

Gear with analytics chart

Optimization

Computer screen displaying SteadySun

Delivery

Meteorological data available

All of the essential weather data for monitoring and optimizing your PV assets

TypeShort nameDescriptionUnit
ProductionpacSolar AC power at inverter outputW
Irradianceghi, bni, dhi, bhiGlobal, beam, diffuse, horizontal irradiance with the cloud cover taken into account.W.m⁻²
PARparPhotosynthetic active radiation.W.m⁻²
Wind parameters10m_gustMaximum wind gust speed 10 meters above ground.m.s⁻¹
10m_wind_speedAverage wind speed 10 meters above ground.m.s⁻¹
10m_wind_directionWind direction at 10m (0° = North).°
hhwsWind speed at turbine hub height (25–100m).m.s⁻¹
Temperaturet2m, td, t_cellAmbient temp, dewpoint, and cell temp.°C
Humidityrh2m, q, tcwvRelative/specific humidity and water vapor content.%, g.kg⁻¹, kg.m⁻²
Cloudshcc, icc, mcc, tccCloud cover (high, low, medium, total)[0-1]
PrecipitationmtprPrecipitation rate.mm.h⁻¹
Pressure & Densitymlsp, mspMean sea level and surface pressure.hPa

Ready to experience our solar forecasting API?

Put our forecasts to the test — easily integrate our solar data into your tools and see the impact firsthand. With our solar API, nothing could be simpler or faster.

Use cases

SteadySat, real-time satellite imagery for solar forecasts

Access live solar irradiance data, and much more, to optimize solar production and energy efficiency.

Solar power forecasting

Accurate solar power forecasts using weather-based models. Anticipate variability and optimize energy performance with confidence.

Wind power forecasting

Reliable wind power forecasts powered by advanced weather models. Plan ahead, reduce uncertainty, and optimize wind energy output.

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