Solar energy has been breaking popularity records in Poland for several years. By 2026, over 1.5 million installations are working on Polish rooftops. But is the investment still worthwhile now that energy prices have stabilised and subsidy programmes have changed? Let us break it down.
How Much Does a Solar Installation Cost in 2026?
A typical residential installation of 6–10 kWp costs between 22,000 and 38,000 PLN gross in 2026, depending on the panel brand, inverter, and local labour costs. For comparison, the same parameters cost 30–50% more back in 2021.
Prices have fallen primarily due to cheaper components imported from Asia and increased competition among installers — good news for those who have been waiting to decide.
Available Grants in 2026
Key support programmes:
- Mój Prąd 6.0 — up to 7,000 PLN subsidy for a PV installation combined with a home battery or energy management system (HEMS/EMS). The programme runs until funds are exhausted.
- Thermomodernisation tax relief — deduction of up to 53,000 PLN from the PIT tax base. At the 12% rate this saves up to 6,360 PLN; at the flat 19% rate, up to 10,070 PLN.
- Czyste Powietrze — a programme for single-family homes that can fund PV as part of a broader energy retrofit.
How to Calculate Return on Investment (ROI)
A simple payback period formula:
Payback period = Net installation cost / Annual savings
Example: 8 kWp installation for 28,000 PLN, Mój Prąd grant 5,000 PLN, PIT relief 3,360 PLN → net cost 19,640 PLN. Annual energy production: ~7,200 kWh. At 0.85 PLN/kWh and 55% self-consumption, savings are ~3,366 PLN/year. Surplus sold to the grid (net-billing): ~3,240 kWh × 0.45 PLN = 1,458 PLN. Total: ~4,824 PLN/year → payback ~4.1 years.
Net-Billing vs Net-Metering — What Has Changed?
Since 2022, new installations settle under net-billing: surplus energy is exported to the grid at the wholesale market price (RCEm) but you buy electricity at the full retail tariff. The price gap can be significant — this is why maximising self-consumption is crucial through:
- running the washing machine, dishwasher, and water heater during peak production hours,
- adding a home battery,
- installing an EV charger.
When Solar Panels Are NOT Profitable
The investment may not pay back within the expected timeframe if:
- the roof is heavily shaded or faces north,
- annual electricity consumption is low (below 2,500 kWh),
- you buy expensive components from an unknown installer with no warranty.
Use the Solar Calculator
There is no need to do this in a spreadsheet. Use the solar panel calculator on Liczbnik — enter the installation capacity, estimated costs, energy consumption, and available grants, and the tool will calculate payback time, annual savings, and total ROI over 25 years. It is the quickest way to evaluate the actual profitability of a specific installer quote.
Summary
Solar panels in Poland in 2026 are more cost-effective than ever — lower component prices, available grants, and rising energy costs mean the payback period for a typical home is 4–7 years, while the installation lifetime is 25–30 years. The key is a reliable quote, a reputable installer, and maximising self-consumption.