Reuniwatt, a leader in cloud observation and solar irradiance estimation and forecasts, marks its 15th anniversary. The company’s flagship product, the infrared all-sky imager Sky InSight™, continues to revolutionize renewable energy and atmospheric sciences alike.

Reuniwatt, a pioneer in cloud observation and solar irradiance forecasting, proudly celebrates its 15th anniversary, marking a significant milestone in its journey towards empowering the renewable energy transition. Since its inception in 2009, the company has evolved from addressing local energy challenges on Reunion Island to becoming a global leader in atmospheric sciences and renewable energy solutions.

Innovative solutions and key milestones

Reuniwatt’s flagship product, the infrared all-sky imager Sky InSight™, has been instrumental in transforming how cloud cover is monitored and solar energy is forecasted. This patented technology, launched in 2014, provides continuous cloud observations and critical parameters such as cloud fraction and type, enabling precise short-term power production forecasts up to 30 minutes in advance. Over the years, Reuniwatt has achieved several key milestones:

  • Global reach: The company has opened offices in Paris, Toulouse, and Melbourne, extending its reach to over 50 countries. Its expertise in observing rapidly changing weather patterns has made it a specialist in tropical regions and diverse climate zones.
  • Recognition for Innovation: Reuniwatt has been honored as a European Champion for innovation through the H2020 SME Phase 1 programme and selected for the prestigious French Tech 120 programme in both 2020 and 2021. The company has also received numerous research grants and award nominations in space technology and renewable energy.
  • Collaborative projects: Since 2021, Reuniwatt has contributed to the pan-European CONTRAILS project alongside major stakeholders like DWD, Thales and LATMOS. An ongoing pilot project at the EUROCONTROL Innovation Hub in Brussels showcases its commitment to international collaboration.
  • Data Accessibility: In 2024, Reuniwatt launched an observational network and dataset catalogue, providing researchers and organizations access to valuable data from installations across Europe.

What our customers say

“We were scouting for a good partner for nowcasting solutions and our focus was on partner who can provide accurate and reliable solar forecasting to optimize energy production and ensure efficiency for our customers. Partnering with Reuniwatt has been a game-changer for us. Their cutting-edge technology, deep industry expertise, and commitment to precision have significantly improved our forecasting & nowcasting offerings to our customer.” says Manu Paul, Vice President, Heyday Ventures.

“Voltalia has worked with Reuniwatt on several solar projects since 2020. Throughout these projects and related services, we have always appreciated the reactivity and flexibility to adjust to our specific needs and those of the Transmission System Operator. Reuniwatt team is always professional and willing to bring a valuable solution. As client, you can always count on Reuniwatt for services to be delivered!” says Estelle Lemare, Asset Owner, Voltalia

Looking ahead

“The energy meteorology industry has evolved a lot over the last 10 years, and Reuniwatt is one of the drivers of this evolution,” says Nicolas Sébastien, PhD, CTO of Reuniwatt.

“Over the past 15 years, we’ve evolved from addressing local energy challenges to providing cutting-edge solutions for the global renewable energy market and beyond,” reflects Nicolas Schmutz, CEO and Founder. “We’re proud of our journey and the impact we’ve made in advancing clean energy adoption, climate research, and sustainable technologies worldwide.”

Reuniwatt will continue to deliver excellent products and services based on solid R&D. Looking ahead, the company is excited to continue pushing the boundaries of what’s possible with all-sky imaging, satellite-based services, and day-ahead forecasts, with applications ranging from remote off-grid mines to airport sites and research vessels. As the world faces the challenges of climate change and the need for cleaner energy sources, technologies like those developed by Reuniwatt will be more important than ever in creating a sustainable future relying on wind and solar energy. To the next 15 years of innovation and beyond!