Yes, the optimal time to charge a PHEV for lower emissions depends on the local electricity grid’s renewable energy availability:
- Solar-heavy regions (e.g., California):
Midday charging aligns with peak solar production, reducing emissions by up to 70% compared to overnight charging. - Wind/nuclear-heavy regions (e.g., Midwest or New York):
Overnight charging leverages wind energy or low-carbon sources like nuclear, cutting emissions by ~20% compared to daytime charging.
Key factors:
- Grid mix: Time-of-use emissions vary significantly by region due to differences in electricity generation sources (solar, wind, fossil fuels).
- Charging behavior: Frequent charging (especially when renewables are abundant) maximizes electric miles, reducing reliance on gasoline and lowering lifetime emissions.
For maximum impact, charging PHEVs during periods of high renewable generation (e.g., midday in sunny areas, overnight in wind-heavy regions) minimizes carbon footprint. Utilities often provide time-specific charging incentives to reflect these patterns.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/are-there-specific-times-of-day-when-charging-a-phev-results-in-lower-emissions/
