Data and tools to build the solar future

Solar forecasting and actuals data for radiation and PV power data, globally, using satellite and surface measurements.

Instant access to data anywhere

Solar irradiance and solar GIS data

Historical, live and forecast, via CSV download and API

Updated every 10-15 minutes using satellites and real PV data

Trusted by power and solar experts worldwide

PV System Capacity:

Azimuth:

Tilt:

Efficiency factor:

Our data products

Solar Radiation Data - Live and Forecast

Accurate forecast and current solar irradiance and weather data with global coverage

Solar Radiation Data - Historical and TMY

Validated historical solar irradiance and weather data

Utility Scale Solar Forecasts

Solar power forecasting for solar farms or solar parks, delivered via API.

Rooftop Solar Forecasts

Solar power forecasting for rooftops - just one, or thousands.

Grid Aggregations

Thousands of PV systems grouped by market regions or grid assets. Forecasts and estimated actuals updated every 10 to 15 minutes.

Utility Scale Wind Forecasts

Wind power forecasting for wind farms, delivered via API. For Enterprise customers only

Why solar forecasting?

Solcast’s Dr Nick Engerer explains our vision for a solar future.

Transparent accuracy reporting

Add your site and assess recent accuracy for yourself

As soon as penetrations of behind the meter solar PV sites reach 1-2% of total load, forecasting the power output of these PV systems starts to become critical for efficient market and network operation. Without including a behind the meter solar forecast into the overall load forecasting operations, errors in the daily load forecast start to appear. Thankfully, Solcast's Grid Aggregations are easy to set-up, are highly accurate, and can help solve this challenging problem!

The limitations of numerical weather models for solar irradiance forecasting

A brief look at where the use of numerical weather models falls short for solar irradiance forecasting

API Toolkit Launch Makes Accessing Solar Data Easier Than Ever

Starting in April 2019, all registered Solcast users will arrive into our new API Toolkit on login/registration. There, you'll find a set of live demonstration sites for the data product categories relevant to your experience, and be able to create new sites, access recent, live and forecast data, or download historical data at the site of your choosing.

Aaron P.
Battery Optimisation
Nice work on your forecasting algorithm, most impressed - much better than Darksky.
Eclipse Solar Car Team
Solar Car Competition
During competition, we had to compute how much energy we could afford to spend on the road and how much we could recharge at the end of the day. Solcast solar irradiance forecasts allowed us to adjust our daily strategy with great precision