Homeowners who installed heat pumps expecting lower bills are facing shocking costs as extreme winter tests their systems.
First Cold Winter, Shattered Promises
For some families, this is the first such freezing winter since installing a new heating system. For others, it’s a brutal verification of the promises made when signing the contract.
From Normal Bills to Shocking Spikes
As recently as autumn, many heat pump owners were calm. Electricity bills looked normal, often not much higher than the previous year. The problem only appeared in winter, when for several consecutive days temperatures did not rise above zero, and at night dropped deep below -10°C.
Then the heat pump stops being a “smart device” that uses energy from the environment, and starts working at the limit of its capabilities. This particularly affects air source heat pumps, which in extreme cold must rely on electric heaters. The result? Electricity consumption jumps sharply – not by a few percent, but sometimes two or even three times.
Cost Calculations in Extreme Cold
The following simulations concern a detached house of approx. 130-150 m², inhabited by 3-4 people, with external temperatures from -10 to -15°C and standard thermal comfort (21-22°C). It is this type of device that most often appears in the stories of “frightening bills.”
On the worst days, when the electric heaters are working, the cost of one day of heating can exceed 40-50 złoty.
Ground Source vs. Air Source Heat Pumps
This variant withstands the cold much better, as it draws energy from the ground, where the temperature is more constant. This is still a lot, but the difference compared to air source heat pumps in extreme cold can be colossal.
This is where many owners feel most disappointed. In winter, electricity production from panels is low, while demand is record-breaking. If the home operates on a net-billing system, energy fed back in summer does not always cover the expensive electricity purchased in winter.
Multiple Factors Behind Bill Explosions
Why did heat pump bills explode this winter? There are several reasons. They rarely occur individually. Most often, they叠加 on each other.
In practice, this means one thing: the bill does not show only the price of the technology, but also the quality of the entire home design.
Where Promises Met Reality
The most emotional stories are those of people who were promised specific amounts. “You will pay 300-400 złoty monthly for heating”, “the pump will handle even -20°C”, “photovoltaics will balance everything”. The problem is that such guarantees were not always lies, but often referred to ideal conditions that no one stated directly.
When any of these elements didn’t work out, the bill turned out to be a brutal surprise.
Why Varying Heat Pump Costs
Why do some pay 400 zł, while others 1400 zł for a heat pump? Sometimes the bill is to blame. Many stories of “frightening bills” begin with one moment: someone opens the energy supplier’s app or an email with an invoice and sees a staggering amount.
The problem is that this is not always the actual bill for electricity consumption in a given month. In Poland, a huge portion of households still settles accounts based on forecasts rather than actual consumption. With heat pumps – especially in winter – this can completely distort the cost picture.
The forecast can be high because: Only the settlement bill, based on meter readings (remote or manual), shows how much electricity actually went to heating.
