Cut Summer Electricity Costs: How to Save €5–€25 a Month With Your Refrigerator and Freezer

Cut summer electricity costs for cooling appliances: how much you can really save

If you set your refrigerator and freezer correctly, defrost regularly, and place them well, you’ll typically save €5–€25 per month in summer. Over a year, that’s often €60–€300—without buying a new appliance.

What does fine-tuning temperature and ice buildup really do?

Many appliances run too cold in summer. Or they’re heavily iced over. Or they sit right next to the stove or in the sun. That wastes electricity. With a few simple changes, you can get those costs back.

Key assumptions for the calculation:

• Electricity price: €0.30 per kWh (typical reference value)
• Appliances that are too cold, iced over, or poorly placed often use 20–40% more electricity
• Optimized settings: refrigerator around 7 °C, freezers -18 °C, defrost regularly, leave space from the wall, not next to the stove or a window

Master table: savings by household type (before vs. after)

The table shows typical examples for a single person, a couple, and a family. Your exact values may vary. But you can clearly see: even simple steps save noticeable money.

In summer, cooling appliances often run longer and use more electricity. If you use all five steps in this guide (temperature, defrosting, placement, door discipline, fill level), €5–€25 per month is realistic. Households with many or older appliances are often at the high end.

Step 1: Temperature check — the fastest immediate savings

Too cold is expensive. Many people unknowingly set the refrigerator to 3–4 °C. That costs extra electricity with no real benefit.

How to set it optimally:

• Set the refrigerator to about 7 °C.
• Set the upright freezer or chest freezer to -18 °C.
• Use a simple thermometer on the middle shelf of the refrigerator.
• Wait 12–24 hours and check the temperature again.

Your benefit: you save electricity immediately, but your food still stays safely fresh.

Which temperature is where in the refrigerator?

• The top is often a bit warmer.
• It’s colder at the bottom above the crisper drawer.
• The door is the warmest (good for drinks, sauces).

Store easily perishable items (e.g., ground beef) in the colder area. That keeps them safe even if you set the overall temperature to 7 °C.

Step 2: Ice-free routine — defrost every 2–3 months in summer

Ice on the walls may look harmless at first. But every layer of ice acts like a blanket. The appliance has to work harder. That costs electricity.

Rule of thumb:

• As soon as the ice layer is thicker than 5 mm, defrosting is worth it.
• In summer: check every 2–3 months and defrost as needed.

Easy defrosting in just a few steps

• Move food into a cooler or keep it wrapped in newspaper in a cool room.
• Turn off the appliance and unplug it.
• Place towels in and in front of the appliance to catch meltwater.
• Put a bowl of warm (not boiling) water inside to speed up the process.
• Do not pry off ice with sharp objects (risk to the lines).
• After defrosting, wipe the appliance dry and turn it back on.

Your benefit: a defrosted appliance often uses 10–20% less electricity. With multiple appliances, that saves noticeable money.

Step 3: Optimize placement — avoid heat sources

In summer, the kitchen heats up quickly. If your refrigerator is right next to the stove or in the sun, it gets extra heat. Then the compressor runs more often.

• Do not place cooling appliances directly next to the stove or oven.
• Avoid direct sunlight, e.g., from a window.
• Leave at least 5–10 cm of space between the back and the wall so hot air can escape.
• Make sure ventilation grilles at the top or bottom are not blocked.

Even small changes help. Sometimes it’s enough to rotate the appliance a bit or move it 30–50 cm.

Your benefit: the appliances run less. You save electricity, and the appliance lifespan often increases too.

Step 4: Door discipline — every second counts

If you leave the door open for a long time in summer, warm air flows in. The appliance then has to cool aggressively to get back to the target temperature.

How to keep door-open times short

• Think ahead about what you need. Then open the door only once.
• Put groceries away in batches instead of many small steps.
• Store drinks you use often together in an easy-to-reach spot.
• Check the door seals. They should be clean and elastic.

Your benefit: you avoid unnecessary power spikes and reduce wear on the appliance. This has a strong effect especially with kids in the household.

Step 5: Manage fill level — neither empty nor overstuffed

A good fill level helps keep the temperature stable. That saves energy.

Refrigerator: better moderately to well filled

• A half-full to well-filled refrigerator holds the cold better than an almost empty one.
• Don’t put hot food inside. Let it cool down first.
• Don’t place items directly in front of interior ventilation slots.

Freezer: packed sensibly

• A well-filled freezer holds the cold longer, even with brief door openings.
• Use filled water bottles (with some air space for expansion) to fill empty areas.
• Sort foods by type (e.g., vegetables together, bread together). This helps you find items faster and keeps the door open for less time.

Your benefit: temperature fluctuates less. The appliance works more steadily and uses less electricity.

Additional micro-tips specifically for summer

• Check the door seal regularly with a paper test: clamp a piece of paper in the door. If it slides out very easily, the seal may be weak.
• Wipe rubber seals now and then with a mild cleaner. Dirt can degrade the seal.
• Don’t put open containers of water in the refrigerator. More humidity tends to cause ice buildup.
• After defrosting a freezer, leave the door open briefly so residual moisture can escape. That helps prevent new ice from forming as quickly.

What’s realistic for your household?

Your exact savings depend on many factors: age and efficiency class of the appliances, room temperature, usage habits, number of people. The examples in the table help you estimate the range.

• Single with one appliance: more in the range of €1–€5 per month.
• Couple with 1–2 appliances: usually €3–€10 per month.
• Family with multiple appliances: often €5–€25 per month, especially with older or heavily iced-over appliances.

You don’t have to do everything at once. Start today with one step:

• Day 1: Check and adjust temperature.
• Day 2: Defrost the freezer compartment or chest freezer.
• Day 3: Check placement and improve it if possible.
• Ongoing: Practice door discipline and manage fill level consciously.

This spreads out the effort. But the impact on your electricity bill lasts throughout the year.

Conclusion: small changes, lasting impact

With simple temperature fine-tuning, a consistent defrosting routine, a bit of space from the wall, and smarter use of doors and storage space, you can significantly reduce your summer electricity costs for cooling appliances. You don’t need new appliances or expensive add-ons. Just start today and keep the savings month after month.