Power consumption of the fully automatic machines
The consumer portal Chip365 took a close look at 35 fully automatic coffee machines and paid particular attention to energy consumption. The results showed big differences: The most economical model, WMF Perfection 750, consumed 100 watt hours in the test cycle, which is intended to simulate a typical day. If the coffee machine is used 365 days a year and an electricity price of 0.4 euros per kilowatt hour, the annual energy costs for operating the fully automatic machine are 14.60 euros. The worst participant in the test, on the other hand, was different: The consumption of the Krups EA 875E Intuition Preference+ model was measured at 1,300 watt hours per day – with the same use and the same electricity price, this results in annual costs of 189.80 euros. The power consumption of the machines was the greatest for heating and brewing, in stand-by mode Chip365 was able to determine an average power consumption of 10 watt hours per day, which is hardly significant 1.46 euros per year.
There are also big differences in other preparation methods
Other methods of coffee preparation have been studied by SALT, the Swiss Alpine Laboratories for Energy Efficiency. The methods tested included a simple filter machine, the mocha pot, and boiling the water and then filtering it. The test participants also included two fully automatic machines and two capsule machines, one of which was advertised as energy-saving. The test showed that the most expensive was the inefficient fully automatic machine, whose annual consumption was extrapolated to 196 kilowatt hours. The Swiss testers also showed how different the power consumption values can be for fully automatic machines, the energy-efficient fully automatic machine cut off economically with 44 kilowatt hours per year. Boiling the water in the kettle proved to be the most economical: Here, an annual electricity consumption of 25 kilowatt hours was calculated – at the electricity price assumed above, just 10 euros a year. The filter coffee machine was also frugal with 33 kilowatt hours per year – but the requirement here was that the heating plate was switched off after 20 minutes. The testers emphasized that the heating plate can make a significant contribution to electricity consumption.
The capsule machines performed similarly to the efficient or inefficient fully automatic machine, with an annual consumption of 35 or 140 kilowatt hours measured. The mocha pot finds itself in the midfield; for him it was a matter of how it was heated: on a small, suitable stovetop, the annual electricity requirement is 36 kilowatt hours and thus similar to the energy-efficient filter or capsule machine, but it is 92 kilowatt hours if you use a large stovetop
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