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Is my heat pump's electricity bill too high?

Four numbers, one minute: whether your heat pump uses more electricity than houses like yours, what that costs a year and what you can do.

Heat pump electricity last year (kWh)From the bill or the heat pump's own meter.Heated living area (m²)Building ageType of heat pump

More precise, if you know it

Electricity price (€/kWh)Efficiency promised in the quoteHeating demand from the energy certificate (kWh/m²·a)Replaces the typical value for the building age.People in the householdFor hot water.PostcodeFor weather adjustment of the billing period.Billing fromBilling to

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Your entries stay in this page's address; we do not store them. For the weather correction only your postcode's centre point and the period go to Open-Meteo. Privacy →

Verdict

Weather-adjusted · Berlin 4 % colder than usual

Raised: worth a look

48 % above the usual range

Implied efficiency 2.03, promised 3.50
Up to 468 € a year, 2,340 € over five years, if settings are the cause
Within the warranty the installer bears the remedy
First step: a letter requesting an operating check, ready in the report

Heatproof is independent of manufacturers and installers. This verdict rests on your entries and on typical values; it replaces neither a measurement on site nor legal advice.

As a report with a letter to the installer · 19 €

Dated report with a report number that you can pass on
Every number with its source and certainty level
Ready letter to your installer: operating check, documents, appointment within 14 days
Next steps and your rights under the warranty

Right after payment, to print or save as PDF. The link also arrives by email.

For the letter, if you like

Your nameInstallerAddress of the systemHeat pump brand

Create the report right away; I know that this ends my right of withdrawal (terms).

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Not an expert opinion, not legal advice. A bill does not prove a defect; the report requests the check. With the order we process your email address and your entries to create and deliver the report (Art. 6(1)(b) GDPR). Privacy →

Where every number comes from9

Your electricity use9,600 kWh MeasuredYour electricity bill or the heat pump's own meter · A dedicated meter for the heat pump makes it exact; a household meter includes the rest of the house.

Heated area160 m² MeasuredYour input · Living area from the building documents.

Heating demand14,976 to 19,968 kWh EstimatedTypical value for the building's age class × area (dena, Verbraucherzentrale) · The energy certificate or heat-load calculation replaces the typical value; a connected heat meter measures it.

Weather factor of the billing period×1.04 Calculated3,386 degree days in Berlin against 3,247 on average over the previous ten years (Open-Meteo, ERA5/ERA5-Land (Copernicus); GeoNames) · The factor raises or lowers the usual range, so a cold winter does not look like a defect.

Hot water2,000 kWh Estimated12.5 kWh per m² per year, the German building-code reference · The system's own counters show the real hot-water share.

Usual efficiency (COP)2.7 to 3.3 ComparedField tests in existing houses (Fraunhofer ISE) and 139 heat-metered homes (HeatpumpMonitor.org, CC BY 4.0) · The system's own efficiency comes from the device counters or the sensor kit.

Usual electricity use5,144 to 8,136 kWh CalculatedHeating demand plus hot water, divided by the usual efficiency · With a measured heat demand the range halves.

Implied efficiency of your system2.03 EstimatedEstimated heat demand divided by your electricity use · Only a measurement on the system turns this into a reliable number.

Promised efficiency3.50 MeasuredYour quote or subsidy application · The promise is the yardstick for a defect notice.

Measured: a meter reading or your input. Calculated: from measured numbers with a published formula. Compared: against heat-metered homes or field tests. Estimated: from typical values, about ±25 %.

What this check cannot know4

Whether the cause is a setting, the sizing, usage or the device. That needs the system's data or a visit.
Whether the system is getting worse over the winters. That needs two winters of measurement.
How much other appliances on the same bill account for, if the heat pump has no meter of its own.
Whether the area and age class describe the house well; a renovated old house needs less than its year suggests.

Is a bill not enough? The expert report from your system's own data, co-signed by a licensed expert: Expert report, 299 € →