Solcast Products

Evaluate Data Access

Testing the Solcast data API

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Live and Forecast

How often do you update the forecast and live data?Getting started with Rooftop PV sitesWhere do I find my Resource Id?Rooftop PV ModelAdvanced PV Model

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Historical Time Series

Historical Time Series OverviewHistorical Time Series - Time Date FormatsWhat is a Time Series data 'request'? How many 'requests' do I need?Do you store old/historical forecasts?

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Grid Aggregations

Grid Aggregations

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Horizon Angles

Horizon Angles - FAQs

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Historical Forecast

Historical Forecast

Data Modelling

Modelling - FAQs

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Explaining Terms

Glossary of termsAzimuthSolar AzimuthSolar ZenithWhat is Spatial Resolution?Why we don't provide data in local time? Terrain Tilt and AzimuthWhat is tilt? How can I estimate my rooftop solar system's tilt?

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Resolution and Accuracy

Solar Radiation Forecasting and Historical DataGlobal Coverage

Solcast API

What is an API request? How many API requests do I need?

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Documentation

Postman API (Spec) Documentation

Data Parameter DefinitionsAPI Change LogWhat is an API? What is an API key? How do I use my API key?Authentication with the Solcast APIPVsystWhat is the difference between PV, PV10, PV90?

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API Troubleshoot

Data Troubleshooting

Hobbyists and Researchers

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Home Hobbyist Accounts

Home Hobbyists - FAQsIssues adding your 2nd home PV sitePV Tuning DiscontinuedCreating a second PV siteHow do I create a multiple azimuth Rooftop Solar site?How do I delete my account?

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Researchers and Academic Accounts

Researcher - FAQsResearcher and Student access to the Solcast API serviceHow do I cite the Solcast API service in my research work?

Troubleshooting and FAQs

Data Troubleshooting and FAQs

What timezone are the timestamps?

User Guides

Subscription Management

Solcast Historical Time Series

Modelling global cloud cover on a 1-2km scale using Solcast's industry leading radiation model.

High resolution and low uncertainty historical Time Series and TMY data for energy simulations and bankable solar resource assessments. Ready to integrate via API.

Detailed global satellite observations that capture cloud cover with precision

The radiation is modelled at the 90m resolution using a terrain grid, to render a precise and accurate global snapshot of historic solar irradiance.

Historic Time Series data can be used to generate large scale historic irradiance analysis like below. We’ve averaged irradiance recieved in February for all of europe and compared that to February 2023.

• Solcast Historical Time Series
• Detailed global satellite observations that capture cloud cover with precision