CUBE : Technology

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Estimation as close to reality as possible

CUBE is the first service to integrate a measurement cabin to refine and validate energy production potential.



Meteorological cabin

Illustration de l'incertitude du GHI annuel

Collecting meteorological data

Autonomous, secure, and turnkey, the measurement cabin is installed on the future photovoltaic power plant site for 12 months.


Installed without prior administrative declaration and in parallel with the impact study, the measurement cabin continuously collects all relevant data from the prospective site (sunlight, temperature, soiling, etc.). Thanks to the collected meteorological data, it corrects satellite databases. This process, called calibration, allows for an energy production potential estimate that is as close to reality as possible.


Illustration d'erreur dans la base de données satellite et calibration

Calibrating satellite data

Calibration is performed by correcting historical satellite data using the on-site measurement campaign.


The CUBE service allows the calibration of satellite databases used to establish a typical meteorological year. Calibration is carried out by correcting historical satellite data using the on-site measurement campaign. The systematic difference between on-site observation and satellite observation is qualified, and an artificial intelligence algorithm processes the data to correct the bias.

Yield report

Illustration d'une année météorologique typique et yield report

Securing the Economic Model

The Yield Report quantifies the expected production for a given site. It presents the P50 and P90 values of production, detailing the variability and uncertainty associated with each characteristic (sunlight, temperature, soiling). It forms the foundation of the economic model for projects and is a key element for investors, banks, and stakeholders (experts, technical advisors, etc.). The P90 is the reference value for banks to size the debt, so the higher the P90, the greater the borrowing capacity for the developer. The P50 allows investors to assess project profitability.

Therefore, it is essential to minimize the gap between estimation and reality as it can be particularly detrimental in the medium to long term. That's why CALIBSUN has designed a measurement cabin to conduct representative year-long campaigns and developed an innovative calibration algorithm capable of eliminating systematic errors in satellite data history to obtain P90 and P50 values that are as close to reality as possible.