Solar PV forecasting

Integration of photovoltaic energy in electrical networks (self-consumption, microgrids, utilities distribution networks...) is a new challenge. In order to facilitate PV penetration the forecasting of solar energy is required.
This section provides various tools to forecast PV production anywhere in the world.
A PV forecasting tool is needed to estimate the available PV resources for the day(s) after. Most of the developed solutions use weather forecasts supplied by specialized providers.

Forecasting services mainly apply to utility scale solar photovoltaic systems.


Yield Assessment for Power Generation Sites based on meteorological and real plant's data.
Now available: enercast YAS, a new tool for site assessment of solar plants and wind turbines.
PV and Wind power forecasts for integrating renewables into the electricity market : Enercast delivers new wind power fore-casts every 15 minutes and PV forecasts for the next 10 days four times a day.

SteadySun is company dedicated to solar production forecasting.
Their solar energy forecasting services cover:

– Solar production or resource (DNI, GHI)
– Time horizons of a few minutes to a few days.
– All types of technology (photovoltaic, with or without tracking, CPV, CSP)
– Worldwide geographic coverage
– Any size of installation and aggregation: from a few kW to forecasts for a whole country!

Reuniwatt offers cutting-edge solutions for high-resolution observation of the cloud cover and the solar irradiation, and short-term forecasting services. Acknowledged by industrials and researchers, they have been successfully deployed across all continents.

Geostationary satellite images are processed using our proprietary method SunSat™ to retrieve cloud cover and solar irradiance at the ground level at a kilometric resolution. The data is available worldwide over

EDF Store & Forecast commercializes on-demand renewable production and consumption forecasts to guarantee a better performance and energy control of solar photovoltaic installations.

This tool is dedicated to big MWp grid-tied solar farms with storage.

PVSCOPE™ (*) generate day-ahead and intra-day photovoltaic power production forecasts.

SolarFor™ is a software solution for solar power forecasting. SolarFor™ delivers predictions of solar power production for the operational horizon (ranging from a few minutes ahead in time, up to a couple of weeks). SolarFor™ is flexible and has a long track record of producing accurate forecasts. Like WindFor™, SolarFor™ is applicable both on individual portfolios and on a country-wide scale. To learn more about SolarFor™ on a country-wide scale,

Actual and forecast solar irradiance and power data, globally, using satellites and surface measurements

Instant access to data, anywhere:

- Historical, live, and forecast
- Updated every 10-15 minutes, using satellites and real PV data
- Trusted by power and solar experts worldwide

SOLARGIS FORECAST offers a real-time satellite-based forecasting and nowcasts based on Solargis models.

- High-quality nowcasting up to next 6 hours and forecasts up to 10 days
- Available for any site globally
- PV power output predictions based on your own plant configuration
- Support for tracker systems
- Option for

The Energy Weather PV forecast is a flexible prediction system for solar power prognoses.

It combines a physically based calculation basis for the radiation path with the mix of the currently best weather models. A complete database of all registered photovoltaic plants in Germany enables flexible and individualized forecasts for every conceivable application, from individual plants to the nationwide production sum, from intraday forecasts to the 10th forecast day.
A technical infrastructure supports the provision of the data in any desired format and thus without any customer-specific integration effort.

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