by Problems with the accuracy of electric vehicle charging stations in the UK
For most drivers, the refueling process is routine: connect, refuel, receive a bill. However, for electric vehicle owners in the UK, this matter can be a cause for concern. New research has found that almost every third public charger incorrectly calculates the amount of energy transferred to the vehicle.
According to data from the independent inspection provider EVCI Global, 31.5% of the tested charging devices either overestimated or underestimated the amount of energy transferred. In approximately 15% of cases, the error exceeded 5%, and some devices showed, according to the company, “significantly larger deviations.” This puts electric car drivers in a more financially vulnerable position compared to owners of gasoline cars, whose fuel stations are subject to much stricter control standards.
The difference in regulation between gas stations and chargers
The research, first reported by The Telegraph, highlights the difference in regulatory approaches. Traditional fuel pumps are subject to strict mandatory verification and typically must operate within a tolerance of -0.5% to +1%. In contrast, most meters on public electric vehicle charging stations have a permissible error of up to +2%. Despite this, almost a third of the EVCI-tested devices did not even fall within this permitted range.
The company insists that public charging devices should be included in a formal verification system, similar to the one in place for fuel pumps, and has already raised this issue with the relevant government agencies.
Examples of critical deviations and industry reaction
EVCI CEO Craig Marsden cited an extreme case where a charging device delivered 37% less electricity than it displayed on the screen. It is important to note that there were also reverse situations where chargers underestimated the amount of energy provided, so drivers paid less. This data was presented to the Parliament’s Transport Committee.
People with electric vehicles need to know they are getting what they pay for, just as they do at gasoline stations
EVCI argues that this creates a two-tier system where electric vehicle owners, especially those without access to home charging and reliant on public infrastructure, risk overpaying. One charging session can cost over £70, and annual expenses can approach £2000, and this is without accounting for meter errors.
The position of the charging industry and authorities
The industry association ChargeUK disagreed with the report’s conclusions, stating that inaccuracies are isolated cases, and measuring electricity transfer is a technically more complex process than measuring liquid fuel. A representative of the Ministry of Transport noted that public charging points are expected to accurately measure and supply electricity, and meters on most of them are regulated to ensure accuracy within 2%.
Nevertheless, electric vehicle owners undoubtedly want to see a sharp improvement in the situation in subsequent reports. Otherwise, it could negatively impact the pace of the transition to electric transport.
This situation points to a more general problem arising during a period of technological transition: infrastructure and regulatory mechanisms do not always keep pace with the rapid development of new technologies. Consumer trust in the public charging network is critically important for the mass adoption of electric vehicles. For now, drivers face not only the issue of charger availability but also uncertainty regarding the fairness of calculations, which adds a psychological barrier. The success of the “electric revolution” will depend not only on the range or price of the cars but also on the transparency and reliability of the entire accompanying service, including such a seemingly simple element as the meter of consumed energy.
