Worldwide real-time solar irradiance data

A sample of Solcast’s high-resolution solar irradiance data in Texas

Live solar irradiance data, available globally through a flexible API framework that’s fast, easy and free to try.

Solcast tracks the Earth’s cloud cover by combining a wide array of unique datasets - including satellite imagery, weather models and aerosol datasets - so you don’t have to. Use our API Toolkit to access solar irradiance estimates in real-time.

Solcast delivers operational solar irradiance data around the world

Our live solar irradiance data are utilised by 30+ enterprise clients and more than 5,000 unique users. We also feature a global network of high-profile partnerships to deliver 24/7 support and bespoke contracts.

Selected customer profiles:

First Solar

Headquarters:Tempe, Arizona, USA
Core business:Global solar project development and operations

Duke Energy

Headquarters:Charlotte, North Carolina
Core business:Fortune 150 Company; Electrical utility with >7.7M customers


Headquarters:Paris, France
Core business:Global solar project development and operation

Meteocontrol GmbH

Headquarters:Augsburg, Germany
Core business:Global PV monitoring and analytics

Vietnam Electricity (EVN)

Headquarters:Hanoi, Vietnam
Core business:National system operator in Vietnam

Australian Energy Market Operator (AEMO)

Headquarters:Melbourne, Australia
Core business:National system operator in Australia

Global Enterprise Partnerships

North America, China, Vietnam




South America




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Solcast API Toolkit

Access real-time solar irradiance data within minutes by creating your free API Toolkit account.

Download solar radiation data from just moments ago, reaching back 7 days in the past in CSV, JSON or XML format for your areas of interest. No credit card required. No commitment to buy. Just instant access.

We crunch gigabytes of satellite data on the fly in just seconds to deliver you the latest solar irradiance data

We built an entirely new approach to solar irradiance modelling using the latest in high-resolution weather satellites, machine learning, computer vision and big data. We crunch nearly 10TB of input data every month in a cloud-based environment on AWS and provide real-time access to our data via API. Our Live solar irradiance data products include:

  • Solar irradiance data (GHI, DNI, Diffuse)
  • Available from real-time through 7 days ago
  • Global coverage (all six major continents)
  • Rapid update (new irradiance data every 5-15 minutes)
  • Exceptionally low latency (tens of seconds for computation)
  • Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
  • High-resolution data (1-2km)
  • Choose between 5/10/15/30 minute resolution
  • Delivered via REST API (download CSV, JSON or XML)
  • Historical datasets available for up to 20 years
Solcast API Toolkit

Live solar irradiance data is just a few clicks away via our API Toolkit!

Create your free API Toolkit account, and we will provide you with 1000 free API calls, plus an additional 10 free calls per day for each solar radiation site you create. No commitment required, just instant access to the latest high quality, high resolution solar irradiance data, wherever you need it.