How long can I run my electric geyser with this budget?

How it works

Understand the estimate

A 3 kW element uses 3 kWh when heating continuously for one hour. The estimated running cost is power multiplied by hours multiplied by the rate per kWh.

Make it more accurate

Runtime refers to time the heating element is energised, not the number of hours the geyser holds water warm.

These figures are examples based on editable inputs. They do not represent verified current rates, supplier prices or quotes.

Heating water is a daily habit, not a constant draw

A geyser thermostat switches the heating element on and off. Its rated kilowatts do not mean it runs at full power for every hour the cylinder is on. Actual use depends on hot water drawn, incoming water temperature, cylinder insulation, pipe losses and thermostat settings.

Try the numbers: If a 3 kW element runs for one hour, it uses 3 kWh. At an illustrative R3/kWh that is R9. Your R300 budget would cover about 33 such element-hours, but not necessarily 33 days of hot-water use.

Before relying on the estimate

For a useful household estimate, measure or estimate the element run-time rather than treating the geyser isolator switch position as run-time.

For more detail, read our calculation and editorial standards. The current price and personal circumstances must come from you; we do not fetch or invent live supplier rates.