Our tip for saving energy and costs

How does the efficiency of a power supply affect the cost of electricity?

If we consider the efficiency of a power supply with 85 percent, this means that 17.6 watts are lost for a power supply with 100 watts output power.

If we use power supplies with a higher efficiency, for example with 90 percent, the power loss is 11.1 watts. This also means that 6.5 watts less loss is dissipated to the environment as waste heat.

For an industrial PC in 24-hour operation, this means an avoidance of 56.9 kWh per year. If 100 systems are operated, we are talking about a saving of 5,694 kWh or 2084 euros at current electricity prices.

If we consider the CO2 savings, we arrive with the CO2 emission factor of 0.353 kg CO2 at an avoidance of two tons of CO2.

This calculation shows that even small steps can have a positive effect: When purchasing new electronics, not only can money be saved, but the environment is also relieved.

Read also the cover story of "Außenwirtschaft aktuell", "Green IT: From power-saving mode to global mindset", author: Harald Behnstedt, IHK magazine Außenwirtschaft aktuell, issue 11-12-2022: