The refrigerator is one of the electrical appliances that are switched on 365 days a year and require energy 24 hours a day. The power consumption can therefore add up especially with old devices with bad energy efficiency class. How much of your own refrigerator consumes approximately, can be estimated with a small test quite well - and based on the annual consumption, you can then determine the energy costs for a whole refrigerator life. This makes it easier to decide for or against a new purchase.
What does a fridge use?
In general, a refrigerator from the beginning of the 1990s uses more than twice as much electricity as a device from 2010. In individual cases, it can also be about three times the energy requirement.
With current electricity prices, high average electricity consumption can be quite expensive. If, for example, a device from 1993 consumes energy at a price of 150 euros per year, that means over 15 years, 2,250 euros.
A sample refrigerator from 2010, on the other hand, consumes electricity worth 50 euros per year, which adds up to 750 euros over 15 years. This example shows that initially small sums of money can really swing up over the life of a refrigerator.
What determines the energy consumption of the refrigerator?
The energy consumption of a refrigerator is determined not only by the technology used and the resulting performance, but also by the volume to be cooled and some external factors that you can actively change. How to reduce power consumption:
- Do not place the appliance next to the oven, stove or dishwasher
- Do not position the refrigerator next to the heater or in the sunshine
- Do not place warm food in the fridge
- Always open the refrigerator door
- on a good-closing door and perfectly sealed rubber coating pay attention
- regularly defrost the refrigerator to prevent icing [/ llink]
- do not pack food too tightly so that the air can circulate well
How to determine the average consumption of your refrigerator in kWh
The energy efficiency class says little about the actual power consumption of a refrigerator For example, an A ++ device with 88 l of usable volume consumes much less than a refrigerator of the same class with a capacity of 300 l.
With a special power meter, which is switched between the refrigerator and the socket, the energy requirement can be measured and extrapolated very precisely. But there is a method of consumption estimation that works without technical aids. Berechnen Calculate the power consumption of the refrigerator based on the power consumption
Check the power consumption in Watt for your refrigerator. In our calculation, we assume that the manufacturer's instructions are correct, your device is ice-free and there are no heat sources in the immediate vicinity.
Stop the number of minutes per hour the compressor is in operation.
- Calculate how long the compressor will run within 24 hours.
- Then multiply this number by 365 for the operating time per year. Multipl Multiply the annual operating hours by the power consumption in watts.
- Now you have determined the annual consumption in kWh, which you multiply by the electricity price per unit. The result is your approximate energy cost per year for the refrigerator.
- A sample calculation for costing
The compressor runs 12 minutes per hour, the kWh price is 28 cents and the power consumption of the refrigerator is 130 watts. How much electricity does the device use per year?
12 min x 24 x 365 = 105,120 min = 1,752 h
1,752 h x 130 watts = 227,760 Wh = 227.76 kWh
227.76 x 0.28 cents = 63.77 euros
The refrigerator consumes about 227 kWh a year, which costs about 64 euros. This calculation is a good approximation, but it does not always give exact results due to different circumstances.
Tips & Tricks Even small heat sources close to the fridge can increase the power consumption, for example the coffee machine or the microwave. Store such devices on the refrigerator, then best underlay them with cork coasters.