Plug-in hybrid electric vehicles (PHEVs) emit an average of 2.5 times more CO2 than official test values, said the UK Transport & Environment (T&E) organization on Wednesday in a new study.
According to T&E, the combustion engine would be engaged too often with a PHEV, even during supposed emission-free driving. “It is clear that the emission values of a PHEV vehicle are much closer to those of conventional cars than to those of electric cars,” the study said.
T&E adds that owners of plug-in hybrids do not always charge their vehicles as they should and therefore use the combustion engine too often. This is an already well-known problem, already mentioned in Belgium during discussions on the deductibility of certain plug-in hybrid cars.
However, people who mainly travel short distances with a PHEV, and therefore use the battery, emit very low amounts of CO2.
As a reminder, a plug-in hybrid vehicle represents, on purchase, compared to the same model in thermal version, an average additional cost of between € 7,000 and € 10,000.