August data for China's EV/PHEV/EREV* sales are flat. That's mostly due to weak overall car registrations (down 9% YoY in August). But the percentage is also declining, though the latest month shows a tiny uptick. I seasonally adjust these time series, but because Chinese new year can sometimes be in January and sometimes in February, it's tricky to get entirely reliable seasonal factors. This has been complicated by multiple Covid lockdowns. Sometimes the NBS (National Bureau of Statistics) publishes data for one month, sometimes an average for both January and February, and sometimes no data at all for those two months. I might actually just default to fitting a centred 12-month moving average to the data. In the meantime, for what it's worth, here are the charts.
*EREV = extended range electric vehicle. A petrol motor drives a generator which charges the battery when it is empty. These produce fewer emissions than plug-in hybrids, because plug-in hybrids from some manufacturers use both the electric and the petrol engine to get better performance out of the PHEV.
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