The electricity consumption of a geyser depends on several factors. They are:

• Volume of water sed: This is the most significant factor that contributes to electricity consumption. The more hot water you use, the more electricity is consumed.
• Tap water temperature: If the temperature of the input water is very low, the machine will consume more electricity in heating it up. Thus, a heater in the mountains will consume more electricity than a heater in the coastal regions.
• Temperature of the bath water: This is different from the temperature the thermostat is set at.
• Thermostat setting: This is set to about 60C by default in most machines. A lot of geysers have an external control feature where you can change this to your liking.
• Standing losses: This is the heat lost by the geyser through the surface of the machine. BEE defines standing losses as energy consumption of a filled water heater, after steady state conditions have been reached when connected to electrical supply, when no water is drawn. A lot this depends on the quality of materials used in manufacturing the geyser. Branded geysers are preferable because they use high quality manufacturing materials.