Solar power production forecasts have become an essential tool for solar power producers and developers. As the adoption of solar energy continues to grow, accurate forecasting plays a crucial role in optimizing operations, maximizing revenue, and ensuring grid stability.

The Value of Backtests, or Historical Forecasts

One of the key applications of solar power production forecasting is the use of historical forecasts for revenue studies during the pre-commissioning phases of solar power projects. These studies aim to determine a power plant’s future revenues over its lifetime, providing valuable insights for project planning and investment decisions. Historical forecasts are particularly useful in the context of hybrid solar+storage power plants, where solar panels and energy storage systems are co-located, and managed by an Energy Management System (EMS). If grid-connected, these projects are often required to announce an injection profile to the grid operator, typically one day in advance.  Using backtests, developers can simulate the behavior of the power plant under various weather conditions and forecast different scenarios. This allows them to assess the quality of weather forecasts, optimize decisions taken by the EMS, and estimate the potential revenue using solar forecasts.

Meet us at Intersolar

Are you interested in learning more about solar power production forecasting and its applications? Join us at Intersolar, June 19-21, 2024, where our team will be available to discuss how we can help you optimize your projects. At the event, you’ll have the opportunity to explore the benefits of solar forecasts, understand their impact on revenus, and gain insights into optimizing hybrid solar+storage power plant operations. Don’t miss this chance to discover how solar power production forecasting can drive your business forward. Meet us at booth A4.140 or get in touch for a free consultation!

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About Reuniwatt (

Reuniwatt is a major player of the solar radiation and cloud cover assessment and solar and wind power forecasting. Based on solid Research and Development works, the company offers reliable products and services intended for professionals of various fields, making the best out of two key facets of the meteorology: atmospheric physics and data sciences. A particular focus has been placed on solar energy forecasting, while developing cutting edge solutions to improve the short-term prediction of the solar resource.
The company has won many grants, including H2020’s SME Phase 1 programme, which makes Reuniwatt a European Champion with regard to innovation. Reuniwatt has also been selected among the national fast-growing companies to join the prestigious French Tech 120 programme in 2020 and 2021, and the French Space Tour 2021.