The old electromechanical meters do not record the readings accurately, which resulted in the lower readings than the new meter. This is possible because the accuracy of the meter can be affected by:

• Environmental factors such as weather, temperature and humidity:
  Electromechanical meters consist of many moving parts that have a tendency to wear out and not functioning properly after a period of time.
• The design and meter operation factor:
  The electrical usage measurement mechanism in the electromechanical meter could cause the meter to slow down and sometimes the disk could stop on its own.

Due to these factors, the old electromechanical meters should be changed, especially when it has been used for some time and could no longer record accurate readings.