Scrapping your petrol car for an EV pays back in three years
Research in Science finds a 58% emissions cut from retiring a petrol car in its first year, with exceptions for hybrids, low mileage, and dirty grids—a point often overlooked in coverage.
Key Takeaways:
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Early Retirement: Retiring a petrol car early is better for the climate than driving it out. Scrapping one in its first year and replacing it with a battery electric vehicle (BEV) cuts emissions by 58% over 16 years.
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Carbon Payback: The carbon payback period is approximately three years, as this is when an electric car's lower driving emissions offset the manufacturing emissions, including the battery.
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Exceptions:
- Hybrids: Standard hybrids are efficient enough that replacing them early with a BEV can sometimes increase emissions. Plug-in hybrids also present similar issues.
- Low Mileage: Replacing vehicles with annual mileage below specific thresholds (4,383 miles for cars, 4,248 for SUVs, and 6,707 for trucks) does not pay back.
- Electricity Source: The benefit is reduced where the local grid generates more than 970 lbs of CO2 per megawatt-hour.
Regional Considerations:
The European generation mix makes electric cars approximately three times cleaner than their petrol equivalents, making early retirement a stronger case in countries like France or Sweden compared to Poland.
Policy Implications:
Given the research's focus on taking cars off the road rather than passing them on, scrappage programs are recommended as policy interventions. This involves paying people to destroy working vehicles.