Poland fined solar installer Nasz Prąd PLN 21.5M for unfair contract clauses

Nasz Prąd installs heat pumps, pellet boilers and photovoltaic installations and carries out thermal modernisation of buildings. Poland's competition and consumer authority UOKiK analysed the company's standard contracts, and President Tomasz Chróstny found 21 provisions to be unfair, imposing a fine of PLN 21,475,000.

One challenged clause reserved the right to change the capacity of the installed heat pump after the contract was concluded — on the basis of a 'detailed technical verification' — and with it the price, without guaranteeing the consumer any right to withdraw. That shifted the consequences of equipment selection onto the consumer, when verifying technical conditions and choosing suitable equipment was the installer's job before signing.

Other provisions let the company charge additional costs and imposed high penalties on consumers for failing to prepare a building for insulation work. Chróstny warned the consequences fall hardest on older consumers, who often commit large shares of the household budget to contracts lasting many years without fully understanding what they are buying, what it will cost, and on what terms.

The decision is not final — the company may appeal — and the clauses are only part of the regulator's case. UOKiK keeps getting complaints about subsidies and financing, credit agreements, how sales representatives introduce themselves, and problems withdrawing from contracts. Preliminary proceedings are ongoing into whether consumers were misled about who the representatives were and why they visited, about financing terms, and about the right of withdrawal; UOKiK has also referred a suspected criminal offence over irregularities in how contracts were concluded to the prosecutor's office.

PLN 21,475,000 fine (not final, appeal possible); preliminary proceedings over misleading sales and a prosecutor notified over suspected criminal offences.

A clause let the company change the contracted heat pump's capacity — and its price — after signing, with no consumer right to withdraw.

Contract terms imposed high penalties on consumers for failing to prepare a building for insulation work.

Clauses reserved the right to charge additional costs beyond the deal consumers thought they had made.

The complaint pattern continued after the fine, triggering separate misleading-conduct proceedings and a prosecutor referral.

In home-energy sales the contract is the product: clauses that let the seller change equipment or price after signing turn a green upgrade into an open-ended commitment for the household.

The PLN 21,475,000 decision was announced on October 9, 2026 and is subject to appeal. UOKiK's preliminary proceedings into misleading sales practices are ongoing, and the suspected criminal offence in the conclusion of contracts has been referred to the prosecutor's office.