Consumption is never easy to estimate as it varies from month to month and season to season. 

In the case of residential customers, the following may have a marked effect on the consumption of electricity:

  • Geysers and space heaters working harder during the winter months.
     
  • Air conditioning units working harder during the summer months.
     
  • The number of days weekdays, Saturdays and Sundays changing from month to month.
     
  • A change in the number of people living at the premises. 

Consumption might also vary because of increased consumption of faulty appliances. For example, be aware that there may be a stove element that doesn’t switch off; or a geyser thermostat that stays on.

In the case of business customers, the cause of vastly varying consumption is often due to:

  • Air conditioning units working harder during the summer months.
     
  • Changes in activity levels due to holiday seasons etc. 
     
  • Installation of new electrical equipment