CALIBSUN Dropdown About CalibSun

About CalibSun

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Innovative Forecasting Tools for Energy Transition



CalibSun develops tools designed by and for photovoltaic industry stakeholders.

CalibSun redefines the state of the art in solar resource analysis and understanding. 

The launch of CalibSun represents the culmination of 12 years of research conducted in partnership with the O.I.E (Observation, Impacts, Energy) laboratory of Mines Paris – PSL. 

Also a member of the SciDoSol Chair (Data Sciences applied to Earth Observation data and Solar Energy for energy transition), CalibSun conducts research on solar resource forecasting and exploitation to meet the needs and challenges of energy transition, aiming to maximize the penetration of photovoltaic energy in the energy mix.


Thus, the company offers three complementary innovative tools, at the scientific forefront, perfectly adapted to the market. It supports players in the photovoltaic industry through CUBE (calibration of satellite irradiance databases), SKY (detection of power drops), and NEXT (irradiance and energy production forecasts). CalibSun enables securing investment in new projects, optimizing the operation of photovoltaic plants by maximizing revenue and storage management optimization.


CalibSun offers tools to manage photovoltaic production to make it credible and competitive. 

CalibSun anticipated the transition of photovoltaics from a subsidized economy to a market economy regulated by supply and demand. 

Through a partnership with Mines Paris – PSL, combining photovoltaic and meteorological expertise, CalibSun developed machine learning algorithms for predicting irradiance and electricity production from photovoltaic plants. The company offers three strategic tools, CUBE, SKY, and NEXT, which improve the technical and financial management of ground-based photovoltaic plants, addressing profitability, economic viability, and grid integration challenges to maximize solar energy penetration in the global energy mix.


"CalibSun is a toolbox for irradiance and photovoltaic production forecasts serving energy industry professionals. CUBE allows the selection and validation of the best sites, SKY anticipates local weather hazards, and NEXT accurately predicts irradiance and therefore energy production." - Nicolas Thévenin, co-founder of CalibSun.


Unique Expertise in Photovoltaic Asset Management


A subsidiary of Solaïs, CalibSun benefits from 15 years of expertise in the photovoltaic field. 

CalibSun was founded in 2023 by Sébastien Pitaval and Nicolas Thévenin, founders of Solaïs, a company specializing in photovoltaics for over 15 years and a leader in glare studies enabling the installation of solar plants near sensitive areas (airports, railways, roads, or urban areas…).



Executive Team

Nicolas Thévenin

Co-founded Solaïs in 2008 and its subsidiary CalibSun in 2023. Entrepreneur, marketing, and strategy expert, he has over 20 years of experience in renewable energy, telecommunications, and digital technology sectors. 

Expert in developing photovoltaic project portfolios, he has led the development, acquisition, and operation of photovoltaic assets in Europe and Asia.


Sébastien Pitaval

Started his career in the space industry and co-founded Solaïs in 2008 and its subsidiary CalibSun in 2023. His interest in renewable energies, convictions, and entrepreneurial spirit led him to the photovoltaic sector. 

He develops R&D and engineering activities while implementing Corporate Social Responsibility (CSR) since 2012 within the company. He is also an expert witness at the Aix-En-Provence Court of Appeal.


Benjamin Rodriguez

Director of Development at CalibSun, with 20 years of cumulative experience in commerce, finance, and international management. A specialist in SaaS models, he leads CalibSun's development in France and internationally. 

Leading a team of experts in data science, meteorology, and solar resources, he implements the commercial strategy and valorizes research conducted in partnership with the Ecole des Mines de Paris.

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