Recent press reports suggest that some types of electricity meter (including so-called ‘smart’ meters) are susceptible to gross errors when feeding low-energy lamps, variable-speed drives and other equipment that generates electromagnetic interference.

According to an investigation and review by metering expert Kris Szajdzicki, such measurement errors do occur and their magnitude depends upon the current-sensing technology used by the meter, although the effect may be negligible in normal situations in the domestic market. However, potential for gross error remains in unfavourable circumstances, particularly in industrial or commercial installations or where there is deliberate intent to fool the meter.

Kris has made his assessment available here.