Show notes
The Space Show Presents Marc Berte & Paul Jaffe of the Overview Energy Co. Friday, 2-6-26Quick SummaryThe Space Show hosted a discussion about space solar power with Marc Berte, CEO of Overview Energy, and Paul Jaffe, Vice President of Systems Engineering at Overview. The conversation focused on Overview’s innovative approach to space solar power, which involves beaming near-infrared light from geosynchronous orbit to existing large-scale solar projects on Earth. Marc explained how their system could potentially provide utility-scale power at a lower cost than other space solar concepts, with a target of delivering the first megawatt to the grid by 2030 and a gigawatt by the mid-2030s. The discussion covered technical details such as efficiency, launch costs, and regulatory considerations, with Marc emphasizing that their approach could complement rather than replace existing energy sources. The conversation also touched on potential challenges like debris impact and maintenance in space, with Marc noting that the distributed nature of their satellite constellation would make the system more resilient.Detailed Summary:The Space Show team with our two guests discussed a new space solar power technology that uses existing solar panels to collect energy beamed via infrared/near-infrared radiation. David expressed skepticism about the logistics and regulatory challenges, particularly regarding the potential to bypass utility companies like PG&E. The conversation then shifted to introducing both Marc Berte a nuclear engineer from MIT who is now involved with the space show, along with Dr. Paul Jaffe. Marc and Paul discussed space solar power and Marc’s company’s work on building space energy for delivery to Earth.Marc presented the Overview Energy innovative approach to space solar energy, focusing on wide-beam near-infrared energy transmission from geosynchronous orbit to existing large-scale utility solar projects. He explained that the system requires no modifications to existing solar panels, as it uses near-infrared light matched to the bandgap of common PV materials, achieving up to 60% efficiency compared to 20% with sunlight. Marc addressed regulatory concerns by highlighting that the system operates within Class 1 laser safety regulations worldwide, making it passively safe and compliant with FAA, OSHA, and FDA standards. David inquired about the feasibility of weaponizing the beam, to which Marc responded that it is physically impossible due to the spatially incoherent nature of the laser light used.The Wisdom Team discussed space solar power systems, with Marc explaining that cloud cover only slightly affects beam availability due to site diversity across different geographical locations. Paul shared his experience at NRL researching various power beaming methods, including microwave and optical systems, before transitioning to commercial projects. The discussion clarified that the satellite system uses geosynchronous orbit (GEO) rather than geostationary orbit (GSO), with each satellite having a 200-meter array capable of delivering about a megawatt of power. Marc noted that while the system is not designed for small, mobile military applications, it could potentially support large military installations like Anderson Air Force Base on Guam.The discussion focused on the economic and technical considerations of space solar energy, particularly the challenges of small-scale expeditionary power systems. Marc explained that while small, logistically constrained units may not be ideal customers due to concerns about being laser-designated from space, larger bases and power distribution systems are more promising markets. The conversation also covered power density considerations, with Paul and Marc emphasizing that moving vehicles require higher power density than stationary applications, and that Overview’s approach of using existing solar farms offers advantages in terms of safety and cost-effectiveness. Marc concluded that space solar energy, along with other methods like fission, fusion, and terrestrial solar plus storage, will be needed to meet the world’s growing energy demands over the next 25 years.Marc explained the concept of using solar power satellites to beam energy to Earth, addressing questions about safety, intensity, and market viability. He clarified that each satellite delivers about a megawatt of power, with multiple beamlets aggregated to focus on specific targets, ensuring safe and efficient energy delivery. The system aims to provide a stable power source by filling in energy gaps caused by clouds, night, and seasonal variations, potentially reducing reliance on peak power plants and backup power. Marc also discussed the economic model, noting that contracts would be based on megawatt photons, and the system could reduce overall electricity costs by optimizing power distribution across different regions and times of day.Marc talked about plans for a satellite constellation plan for global solar power distribution, explaining how the system would use ground-based beacons to direct satellites to specific locations for energy transmission. He outlined a timeline with a low Earth orbit test scheduled for January 2028 and first megawatt deployment in 2030, with TRL levels ranging from 4 to 6 across different system components. When asked about timeline acceleration with increased funding, Marc explained that while some aspects could be accelerated by a year or two, space development involves serial negative learning that makes rapid scaling challenging.Our guest explained how his company’s space-based solar power system could complement terrestrial solar installations by providing peak power when needed, without the need for storage. He discussed the economics of launching satellites into orbit, noting that with current technology and pricing, they could be profitable at launch costs of $800 to $1,000 per kilogram. Phil raised concerns about the efficiency of the system, particularly the conversion of solar photons to electricity, but Marc claimed their DC-to-DC efficiency was better than 20-25%. The discussion also touched on the potential for using electric propulsion to move satellites from low Earth orbit to geostationary orbit.Our conversation zeroed in on the technical and economic aspects of space-based solar power systems. Marc discussed the efficiency of solar panels and lasers, emphasizing that while efficiency is important, cost per watt is the critical factor. He encouraged participants to research the DARPA Sheds program and look up published efficiencies of diode and fiber-coupled pump lasers. The group also discussed the impact of debris on satellite systems and the need for latitude-adjusted panel angles. Paul, representing Overview, highlighted the importance of economics in space solar power projects and noted the need for collaboration between the space and energy industries.We also talked about space solar power technologies, with Paul explaining their approach of deploying large satellites (200 meters) that can self-deploy without in-space assembly. The conversation covered the trade-offs between multi-junction cells and silicon-based cells, with Paul noting that while multi-junction cells are more efficient, they are too expensive for ground-based applications. The group discussed the challenges of solar power beaming, including the need to track the beam over long distances and the potential variations in solar cell performance across different wavelengths. David emphasized that while the theoretical business case exists, it remains unproven until operational demonstrations are completed.Special thanks to our sponsors:American Institute of Aeronautics and Astronautics, Helix Space in Luxembourg, Celestis Memorial Spaceflights, Astrox Corporation, Dr. Haym Benaroya of Rutgers University, The Space Settlement Progress Blog by John Jossy, The Atlantis Project, and Artless EntertainmentOur Toll Free Line for Live Broadcasts: 1-866-687-7223 (Not in service at this time)For real time program participation, email Dr. Space at: [email protected] for instructions and access.The Space Show is a non-profit 501C3 through its parent, One Giant Leap Foundation, Inc. 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