Low energy recycling of silicon waste
into high value materials


Our name is Nuvosil which means “new silicon”


By use of new technology, we reprocess silicon waste into high value materials


Trigger a transition from Minimizing to Monetizing waste

About Nuvosil

The solar industry consumes almost half of the silicon raw materials used in the production of solar cells. Nuvosil is focused on innovating the remanufacturing of the silicon waste to valuable end-market industrial applications.  Nuvosil aims to catalyze the solar industry to be a fully circular, or closed-loop ecosystem with all materials staying in endless cycles of value.


PRODUCTION OF SILICON WAFERS generates ~40% of the starting material as waste (swarf)

Silicon metal particle waste (swarf) results from the sawing process and is recovered by filtering.


Nuvosil’s Low Energy Master Alloy (LEMA) rods – using an environmentally friendly and novel screw extrusion process eliminating the need for high energy intensity heating or re-melting. These master alloy rods are made up of silicon and aluminum. Compared to conventional alloying processes, the LEMA technology consumes/ 90 % less energy, costs less per processed unit and offers a cleaner end-product.

CLEANER – higher purity & less CO2   
CHEAPER – lower cost   
GREENER – 90% less energy


The key component of the Low Energy Recycling (LER) process is a screw extruder unit developed and patented by Hydro in collaboration with NTNU.  The technology was initially developed for use on different aluminum recyclable materials.  In 2018, Nuvosil, Hydro, SINTEF and NTNU engaged in a R&D project to test the LER process using a combination of aluminum and silicon and the lab-scale extruder at NTNU. This novel application was verified in 2019 with very promising results.  Consequently, in early 2020 Nuvosil and Hydro initiated the LER Pilot project.  The LER Pilot project aims to design, build, test and qualify an industrial-scale extruder unit and associated processes.  The Pilot project is the last development stage before the industrial phase and commercialization planned for 2022. Once launched, Nuvosil will focus on the combination of silicon and aluminum, while Hydro will focus on aluminum and other non-silicon materials applications.

Our Team


Bjørn-Olav Brelin

Bjørn-Olav Brelin

CEO & Founder

  • Former CEO and General Counsel of NorSun

  • Former General Counsel of Scatec and Partner at Frick, Langseth Law, Oslo.

  • LL.M, University of Oslo and Stanford University Executive program 2017.

Frederik Rustad

Frederik Rustad


  • CEO of Rever Group, a private industrial investment group.Former Managing Director and EVP, Corporate Finance & Investments at Norwegian Energy Company ASA (Noreco).
  • BSc in Finance from BI Norwegian Business School and  MSc in Business Finance from Queen Mary University of London.
Idar Kjetil Steen

Idar Kjetil Steen

Advisor Aluminum

  • Former Chief Engineer, Project Manager and R&D Process Engineer Norsk Hydro
    Product Responsible Casting, Hycast

  • Casthouse

  • Metallurgist , AMR  Engineering

  • Master of Scienc, Physical Metallurgy, NTH Trondheim

Øyvind Nielsen

Øyvind Nielsen


  • Former Senior Scientist and Research manager at SINTEF Materials and Chemistry.
    VP R&D and CTO in NorSun for 15 years

  • PhD in Materials technology from NTNU, Trondheim.


Moon Chun

Moon Chun

Director & Founder

  • Former Director of Silicon R&D at SunPower.

  • Former Director of Technology at Intevac (commercialized solar implanters).

  • Former VP of Engineering at Solar Implant Technologies.

  • Ph.D. in Engineering Physics, Univ. of Wisconsin-Madison and B.S. in Nuclear Engineering, Univ. of California-Berkeley.

Riulf Rustad

Riulf Rustad


Norwegian investor and businessman with 30+ years track record from investments in various sectors, mainly oil & gas, oil services and offshore.

Based in Oslo and London where he operates through his investment platform Rever Group and his private company Ousdal AS.

Currently chairman of Nuvosil AS, Noreco, Rever Offshore and Cecon Contracting AS.

    Marty Neese

    Marty Neese

    Director & Founder

    • CEO at Verdagy, a company focusing on green hydrogen.

    • Board of Trustees Member of the Ellen Macarthur Foundation chartered with advancing the Circular Economy

    • Former COO of SunPower and Flextronics

    • Recipient of the ASQ Hutchens Medal for Sustainability

    • BS, United States Military Academy at West Point and MBA from Univ. of Florida


    Nuvosil and Hydro

    In August 2020 Hydro and Nuvosil were granted financial support by ENOVA for the Low Energy Recycling (LER) Pilot project, in the amount of MNOK 9,6. The project is a collaboration between Hydro and Nuvosil aiming to verify scalability of the Low Energy Recycling process for use on a combination of silicon and aluminum, and aluminum either alone or in combination with non-silicon materials. The total budget is MNOK 18,3 and the project shall be completed by year end 2021. In addition to Nuvosil and Hydro resources, the LER Pilot project is supported by a strong team of technology and industry partners: SINTEF, NTNU, Reifenhauser GmbH and CEMTEC GmbH.

    Nuvosil Press Release – en

    About Hydro

    Headquartered in Norway, Hydro is rooted in more than a century of expertise in hydropower, development of technology and product innovation. Hydro is the only fully integrated company in the global aluminum industry, with operations in 40 countries all over the world. By combining local expertise, worldwide reach and unmatched capabilities in R&D, its 35,000 employees create innovative aluminum solutions for more than 30 000 customers throughout the value chain. 

    Hydro Press Release – en

    About ENOVA

    ENOVA is a governmental entity owned by the Norwegian Ministry of Climate and Environment. ENOVA’s purpose is to support and contribute to reduction of greenhouse gas emissions, development of new energy and climate technology and a strengthened security of energy supply. ENOVA has 80 employees and is headquartered in Trondheim Norway.

    ENOVA Press Release – nb