Is your electricity meter defective? How to identify faults and take action

A faulty electricity meter can quickly lead to problems – from inexplicably high electricity bills to incorrect consumption data. But how can you tell if a meter is actually defective? Which technical abnormalities should you take seriously? And what is the process of replacing a meter?

This blog post will tell you how to recognize a faulty electricity meter, how to perform initial checks yourself, and what steps to take if your meter malfunctions. We'll also introduce you to different types of meters – from the classic Ferraris meter to the smart meter – and show you the advantages of modern technology and how you can use it effectively in your home.

How can I tell if my electricity meter is faulty?

It's not always immediately obvious whether your electricity meter is working correctly. These typical signs can indicate a defect or measurement error:

1. Still display
   The meter shows the same reading continuously, even though electricity is being consumed. This could indicate a faulty meter mechanism or a defect in the electronic components.
2. Unusual counting behavior
   A sudden, significant fluctuation or sharp increase in electricity consumption indicates a faulty meter reading. If the meter continues to run even when the power is switched off, a technical defect is highly likely.
3. Increased electricity bill
   If your bill increases even though you are not using any additional devices, a fault in the measuring device may be the cause.
4. Technical abnormalities
   A flickering display, connection problems, or remote reading errors indicate a malfunction.

Note: An expired calibration can also affect the accuracy of a meter. Regularly check the calibration date and contact your responsible metering point operator if you are unsure.

Checklist: Check your own electricity meter

With this simple step-by-step guide, you can check for initial signs of a defect yourself:

• Compare electricity consumption – with previous bills and seasonal fluctuations.
• Document the current meter reading – daily, at the same time (e.g., at night).
• Switch off the main fuse – if the meter continues to move, there is a fault.
• Disconnect all devices from the mains – including lighting, household appliances and chargers.
• Check calibration – Electronic meters are usually valid for 8 years, Ferraris meters for up to 16 years.
• Meter operators should be informed if the suspicion of a defect persists.

Installation & meter cabinet – what you need to know

The installation of a new electricity meter takes place directly in the meter cabinet. This must comply with current standards and offer sufficient space for modern meters.

For households with high connection capacities – for example, when using a 32A CEE socket, a heat pump, or a PV system – an external current transformer may be required. The grid operator will assess the situation on-site and decide which system is suitable for your household.

Technical background: How electricity meters work

An electricity meter measures the current flow in your electrical wiring and calculates the active power consumption, usually in kilowatt-hours (kWh). The underlying principle depends on the type of device:

• Ferraris counter: mechanical, with rotating turntable
• Digital meters: electronic, with digital counter and display
• Smart Meter: digital meters with automatic remote reading and data transmission

Digital electricity meters and smart meters compared

A digital electricity meter replaces the old Ferraris meter. It measures electricity consumption precisely and displays the total consumption on a screen. Depending on the model, it can also display power values, consumption history, or the amount of electricity fed into the grid – particularly useful for balcony power plants.

Smart meters go a step further: They have an integrated communication unit that automatically transmits data to the network operator. This not only enables automatic billing but also helps to detect irregularities more quickly.

For a detailed comparison, check out our blog article on the different types of meters .

Transparency & real-time monitoring with power readers

If you want not only a functioning meter, but also maximum transparency in the use of your energy data, the electricity reader offers you a practical solution – especially if you want to closely monitor your electricity consumption or check for anomalies yourself.

With the stromleser app, you can quickly see whether your consumption data is plausible – for example, in the case of error messages, peak loads, or inconsistent feed-in.

More information about installation, use and application can be found at stromleser .

FAQ – Frequently asked questions about defective electricity meters

How much does it cost to replace a defective electricity meter?
Usually free of charge if a technical defect is proven.

Am I allowed to replace the electricity meter myself?
No – the exchange may only be carried out by the responsible metering point operator .

How long is an electricity meter calibrated for?
Digital meters: approx. 8 years
Ferraris counter: up to 16 years

What happens when the calibration expires?
A meter without valid calibration may no longer be used for billing . The replacement usually happens automatically.

How frequently do defects occur?
Relatively rare – especially with new digital meters. Older devices are more prone to malfunctions.

Conclusion: Identify errors – replace meters – optimize consumption

A faulty electricity meter is no reason to panic, but it's a clear case for structured action. Compare your readings, check the calibration, observe the metering behavior, and contact your network operator if you notice anything unusual.

Modern digital meters, smart meters and intelligent metering systems offer you more security, control and energy efficiency in the long term – simply, transparently and controllable via app.

❗️ If you have any questions or need support, please contact us by email ( info@energieleser.de ).