Charging Technology
What is the typical range added per hour with Level 1 charging?
About 5 miles per hour.
What is the term for all costs associated with owning a vehicle, not just purchase price?
Total Cost of Ownership (TCO)
Where do most EV drivers charge their vehicles?
at home
What are the five attributes of successful innovations, according to Rogers?
Relative advantage, compatibility, complexity, trialability, observability.
What percentage of uptime is required by NEVI regulations?
Greater than 97%.
What connector is the U.S. standard for Level 1 and 2 charging?
SAE J1772.
What are common components of TCO?
Purchase price, fuel, maintenance, insurance, fees.
What is the SAE J2841 utility factor used for?
Measuring the proportion of PHEV driving done on electricity.
What kind of person is more likely to adopt new tech early?
Educated, high-income, young, risk-tolerant, science-friendly.
What is the goal of the NEVI federal program?
Build a nationwide EV charging network.
What’s the name of Tesla’s new charging standard adopted by others?
SAE J3400 or NACS (North American Charging Standard).
Why are EV maintenance costs lower?
Fewer moving parts, no oil changes, less brake wear due to regen braking.
What kind of travel is public charging most often used for?
Long-distance trips.
What is one reason people choose not to charge their PHEVs?
Lack of home charging, minimal benefit, or inconvenience.
What kind of neighborhood effect can accelerate EV adoption?
Spatial clustering or local word-of-mouth effects.
What infrastructure issue can limit a DC Fast Charger from operating at full power?
Shared power or transformer limits in the grid.
What concept describes the cost savings from producing more units?
Economies of scale.
What is the "EV Charging Pyramid"?
A hierarchy showing most charging at home, then work, then public.
What method allows consumers to “test” a technology before full commitment?
Trialability (e.g., leasing or rentals).
What percentage of early EV adopters were homeowners?
A large majority (up to 80–90%).
What does “make-ready” infrastructure refer to?
The electrical and site prep work upstream of the charger unit.
How much might it cost to install EVSE at a rest stop with complex site prep?
Up to several hundred thousand dollars.
What effect does free work charging have on behavior?
Increases workplace charging; decreases home charging.
What survey method relies on actual decisions already made?
Revealed preference.
What’s a major remaining demographic gap in EV ownership?
Gender and home charging availability.