Power
Real-world data exposes widening emissions gap in plug-in hybrids
Analysis of official 2024 figures shows plug-in hybrid electric vehicle emissions are nearly six times higher than official testing values.
Key points
- Real-world emissions for 2024 PHEV models significantly exceed official WLTP figures.
- The discrepancy is driven by heavier, higher-power models with insufficient electric motor capacity.
- Upcoming utility factor corrections aim to align regulatory accounting with actual climate impacts.
What happened
According to CleanTechnica, an analysis of official 2024 data indicates that plug-in hybrid electric vehicles (PHEVs) continue to display a growing discrepancy between real-world performance and official Worldwide Harmonised Light Vehicle Test Procedure (WLTP) testing values. The findings reveal that average real-world emissions for 2024 models were nearly six times higher than official figures suggest.
This divergence is largely attributed to a market shift toward heavier, higher-power vehicles that lack adequate electric motor power. The empirical findings highlight the necessity of the scheduled November 2026 and 2027 utility factor (UF) correction to better reflect actual climate impacts and encourage technological advancements in vehicle design.
Why it matters
Market evidence following previous regulatory adjustments indicates that targeted corrections can drive improvements in technology and extend electric ranges to offset official emission increases. Analysts suggest that achieving electric ranges between 140 and 220 km by 2030 will help keep PHEV emissions at or below 50 gCO2/km.
However, researchers note that current taxation structures across many member states continue to favor high-emitting models rather than distinguishing strictly based on CO2 performance and electric range. Experts argue that politicians should avoid interfering with the technical methodology of the utility factor, allowing science-based accounting to accurately reflect operational emissions.
What comes next
Co-legislators are advised to support the planned utility factor corrections within current automotive framework discussions. Additionally, complementary taxation reforms utilizing stricter emissions and electric-range criteria are recommended to ensure high-emitting vehicles do not receive favorable treatment over top-performing alternatives.
Original reporting
This article draws on the following reports. Read them in full on the publishers’ sites.
Context from CEII
Grids decide whether generation becomes power that homes and businesses can rely on. Generation mix, transmission and distribution losses, and tariffs together shape reliability and the case for investment.
91.9% of people worldwide had electricity in 2024Countries in this story
Written by the CEII Desk, the Centre’s automated newsroom, from the reporting credited above and CEII’s own data. Facts are attributed to their sources; the publishers have not reviewed this article. Spotted an error? Tell our editors.
