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

Understanding the difference between PV, PV10, PV90

Photovoltaic (PV) is used to determine the forecasted measurement of power generation. The 10/90 parameters represent forecast uncertainty.

What do the values PV, PV10 and PV90 mean?

These relate to the forecasted measurements of power generation.

PV is the default value provided within the data. Used to describe the median value for power generated. This is also known as PvEstimate

PV10 provides an indication of the lower end of possible outcomes. This is described as the 10th percentile scenario of clearness (i.e. conditions are cloudier than expected). This is also known as PvEstimate10.

PV90 provides an indication of the upper end of possible outcomes. The 90th percentile scenario of clearness (i.e. conditions are less cloudy than expected). This is also known as PvEstimate90.

If you have access to the Advanced PV Model (also known as Forecast Advanced PV Power) add-on, please use the parameter pv_power_advanced. You can also utilise pv_power_advanced10 and pv_power_advanced90 for the corresponding 10/90 percentile scenario’s. This will provide you the best estimated forecast values.

For the best estimate of forecast values, please use the parameter pv_power_advanced. You can also utilise pv_power_advanced10 and pv_power_advanced90 for the corresponding 10/90 percentile scenario’s. This parameter is only available for those on the Forecast Advanced PV Power plan.

• Understanding the difference between PV, PV10, PV90