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 sites

Where do I find my Resource Id?

Rooftop PV Model

Advanced PV Model

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Historical Time Series

Historical Time Series Overview

Historical Time Series - Time Date Formats

What is a Time Series data 'request'? How many 'requests' do I need?

Do you store old/historical forecasts?

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Grid Aggregations

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Typical Meteorological Year (TMY)

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Horizon Angles

Horizon Angles - FAQs

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Historical Forecast

Data Modelling

Modelling - FAQs

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Explaining Terms

What is Spatial Resolution?

Why we don't provide data in local time?

Terrain Tilt and Azimuth

What is tilt? How can I estimate my rooftop solar system's tilt?

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Resolution and Accuracy

Solar Radiation Forecasting and Historical Data

Global 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 Definitions

API Change Log

What is an API? What is an API key? How do I use my API key?

Authentication with the Solcast API

PVsyst

What 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 - FAQs

Issues adding your 2nd home PV site

PV Tuning Discontinued

Creating a second PV site

How do I create a multiple azimuth Rooftop Solar site?

How do I delete my account?

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Researchers and Academic Accounts

Researcher - FAQs

Researcher and Student access to the Solcast API service

How 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 ❓Account FAQs

Thousands of PV systems, one forecast

With Solcast Grid Aggregations, you can have access to collective power forecast for thousands of PV sites. Discover more about this product and the valuable data it provides.

Grid Aggregation Data Specifications

Geographic coverage	Global, except for ocean and polar regions.
Temporal coverage	Historic data: January 2007 to 7 days ago Operational data: -7 days ago to + 7 days ahead
Temporal resolution	5, 10, 15, 30 & 60 minutes (period-mean values)
Spatial resolution	1-2km (irradiance and cloud parameters, over all non-polar continental areas and nearby islands) 27km (other parameters, and polar or remote oceanic regions)
Data parameters	• PV Power (MW) (10th, 50th, & 90th percentile) • PV Power (%) (10th, 50th, & 90th percentile)
Data access	Via the Solcast API & Solcast Web Toolkit
File formats	JSON and CSV (CSV not recommended for automation)

Gain an in-depth understanding of Grid Aggregations here or reach out to one of our Solar Data Managers.