Over the past five decades, solar photovoltaics (PV) has transformed from a niche technology into the backbone of the global energy transition. A systematic review by researchers from LUT University, Leibniz University Hannover, and partner institutions shows that solar PV is set to become the world’s primary energy source, though conventional models often underestimate its trajectory.
Global Energy Landscape by 2050: Solar PV Supplying 61% of Electricity
Based on a synthesis of 60 peer-reviewed transition studies covering power, heat, and transport sectors, solar PV is projected to generate roughly 61% of global electricity by 2050.
- Broad Consensus: Most transition models agree that the combined share of solar PV and wind power will reach 80% to 99% of global electricity generation by mid-century.
- Overcoming Legacy Cost Estimates: Older energy models frequently rely on outdated capital expenditure assumptions (e.g., assuming 2050 PV costs above €500/kW), significantly understating solar’s economic competitiveness.
- Diversified Applications: Modern scenarios incorporate diverse PV systems—such as single-axis tracking, bifacial modules, floating solar, agrivoltaics, and rooftop systems—confirming PV’s high adaptability across regions.
Sector Coupling and the “Solar-to-X” Economy
Solar PV is extending its reach beyond standard grid electricity into hard-to-abate sectors such as heavy industry and long-distance transport:
- Power-to-X Pathways: Abundant, low-cost solar electricity enables the production of green hydrogen, e-fuels, sustainable chemicals, and clean water.
- System Synergies: Integrating sector coupling and e-fuel pathways significantly boosts the overall value and utilization of solar PV within the broader energy economy.
Five Decades of Research Milestones
Analyzing over 1,000 studies since the 1970s, researchers identified 29 key methodological and analytical milestones that charted solar PV’s rise:
- Evolutionary Path: Research evolved from 1970s visionary scoping to 2010s hourly-resolution modeling, culminating in 2020s multi-node, multi-sector system optimizations.
- Guidance for Decision-Makers: Energy planners must continuously update cost curves and technology frameworks to avoid building energy systems based on outdated assumptions.
Reference: pv magazine Global.
