US & Calif. Ratio of EVs in Operation to Total Public + Private Charging Connections (all types)

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California accounts for 24.3% of US charging connections, but 31.9% of EVs – so the EV to charging connection ratio is higher than for the total US.

What is the needed ratio? That is a complex question – the IEA has said 10 to 1 for Europe, but my last estimate for Norway, the country with the highest percentage of EVs, was at roughly 31 to 1 – though there are reports of long wait times now in Norway. In my 2019 EVAdoption article, What Is The “Minimum Acceptable” Ratio Of EVs to Charging Stations, I estimated that 15-20 EVs to 1 charging connection should be enough for the next 5-7 more years.

But factors that affect the needed ratio include the mix of BEVs versus PHEVs, average range of BEVs, percentage of renter versus homeowner households who drive EVs, how fast BEVs and DC fast charging stations can charge, growth in remote workers, and more.



Average Range and Battery Size of PHEVs Currently Available in the US

With 32 PHEVs currently available in the US (as of September 21, 2021), they come in a wide variety of types, price, EPA range, and battery size. In the chart below we’ve analyzed the 32 PHEVs across 6 metrics. The mean (commonly referred to as the average) range is 24.7 miles and mean battery size is 13.5 kWh. When looking at the median, however, range drops to 21 miles and battery size down to 12.5 kWh.


PHEVs Account for Nearly 37% of EVs Sold to Date in the US

Through April 2021 PHEVs accounted for 36.7% of EVs (BEV and PHEV) sold in the US since January 2011. And in California, the most EV-centric state in the US, PHEVs comprise a slightly higher percentage of EV registrations to date at 38.3%.

PHEVs with 16 kWh or larger battery qualify for $7,500 tax credit

Six PHEVs Currently Qualify for the Maximum $7,500 Federal EV Tax Credit

There are six PHEVs that currently qualify for the $7,500 maximum tax credit, and their electric range is from a low of 21 miles for the Jeep Wrangler 4xe to a high of 65 miles for the Polestar 1. They also range in MSRP from about $38,000 for the Toyota RAV4 Prime to $165,000 for the Polestar 1. 

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