We deliver operational solar data services around the world to over 24,000+ users

Solcast is trusted by a rapidly growing list of enterprise clients across the globe, and operates a global network of high-profile partnerships to deliver 24/7 support and bespoke contracts.

Global Enterprise Partnerships

North America, China, Vietnam




South America




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Solar data services in support of every solar mission

We’re dedicated to helping you get the job done. Learn more about our offerings and technology by selecting the most relevant topic area for you:

Solar data services… in the cloud

We built a new approach to solar forecasting and modeling technology from the ground up, using the latest in weather satellite imagery, machine learning, computer vision and big databases. We crunch more than 600 million new forecasts every hour in a cloud-based environment on AWS and provide real-time access to our data via API. Use the API Toolkit to access nearly 20 years of historical data, including TMY and Monthly Averages files.

Live & Forecast Data

  • Solar irradiance data (GHI, DNI, Diffuse)
  • PV power modelling (Rooftop or Utility Scale)
  • Global coverage (all six major continents) at 1-2km resolution
  • Rapid update (new forecasting data every 5-15 minutes)
  • Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
  • Probabilistic forecasting outputs
  • From 5 minutes through 7 days ahead at 5/10/15/30 minute resolution
  • Delivered via REST API (download CSV, JSON or XML)

Historical and TMY Data

  • Lowest uncertainty available, zero bias
  • Independent validation & global coverage
  • Highest-resolution data (1-2km), available from 2007 to present
  • PV modelling software integration (PVSyst, SAM, TMY3, CSV)
  • Solar irradiance (GHI, DNI, DHI)
  • Weather (Temp, Wind, Humidity, Snow, etc)
  • Includes aerosol impacts (tracking of smoke, dust, haze)
  • Flexible pricing, no forced subscriptions

API Toolkit Preview - World Solar Radiation API

See our API data in action. Drop a pin on any major continent and instantly see the latest live and forecast solar irradiance data for that location.

Access state of the art solar forecasting technology and the lowest uncertainty historical irradiance data available, all in our API Toolkit

API Toolkit accounts are free to create and provide instant access. Our Free Tier access will allow you to create a free forecasting site, sample our API data and download solar resource assessment files.

New registrations include 10 free API requests per day and historical requests. No credit card or commitment required. Just instant access to the latest high quality, high resolution solar irradiance and PV power data, wherever and whenever you need it.