Solar panels in Gdańsk
PVGIS climate data puts Gdańsk at roughly 1,028 kWh per kWp each year, so a typical 6 kWp roof makes around 6,168 kWh. Using 70% of the power at home instead of 30% moves payback from 16.2 to 9.0 years. May is the strongest month at about 810 kWh and December the weakest at 134 kWh, a 6x swing. Year-one savings come to about PLN 3,114, for a simple payback of 16.2 years. May, June and July together deliver 39% of the year's output, while January, November and December deliver 8%. Gdańsk ranks 2nd of the 3 cities we model in Poland for yield. Kraków gets 1,045 kWh per kWp. Year to year, output varies by about 4% (one standard deviation over 2005 to 2023).
Month by month in Gdańsk
Modelled output of a 6 kWp system at 35° facing south (towards the equator), from PVGIS climate data (PVGIS-SARAH3, 2005 to 2023).
| Month | kWh | Share of year |
|---|---|---|
| January | 163 | 2.6% |
| February | 274 | 4.4% |
| March | 530 | 8.6% |
| April | 741 | 12.0% |
| May | 810 | 13.1% |
| June | 808 | 13.1% |
| July | 771 | 12.5% |
| August | 725 | 11.8% |
| September | 611 | 9.9% |
| October | 415 | 6.7% |
| November | 187 | 3.0% |
| December | 134 | 2.2% |
- Best month: May (810 kWh). Weakest: December (134 kWh), a 6x difference.
- May, June, July produce 38.7% of the year; January, November, December produce 7.8%.
- Year-to-year variation: about 263 kWh (4.3%, one standard deviation).
- Sunlight reaching the panels: 1,311 kWh per m² a year.
How Gdańsk compares
Gdańsk ranks 2 of 3 for yield among the cities we model in Poland, and 28 of 41 across every country on Solar Figures. Within one country the prices are the same, so a payback gap between these cities comes from sunshine alone.
| City | kWh per kWp / yr | Payback (PLN) |
|---|---|---|
| Kraków | 1,045 | 16.0 yrs |
| Gdańsk | 1,028 | 16.2 yrs |
| Warsaw | 1,014 | 16.5 yrs |
| National reference point (country page) | 1,014 | 16.5 yrs |
Closest yield abroad: Berlin (1,022 kWh per kWp), Brussels (1,009 kWh per kWp), Antwerp (1,005 kWh per kWp).
What moves the payback in Gdańsk
Power you use yourself is worth the retail price (PLN 1.00 per kWh); power you export earns PLN 0.30. So the share you use at home, by running appliances in daylight or adding a battery, changes the payback. The system cost stays the same in every row (a battery would add to it).
| Used at home | Year-1 savings | Payback |
|---|---|---|
| 20% | PLN 2,687 | 19.5 yrs |
| 30% (our default) | PLN 3,114 | 16.2 yrs |
| 50% | PLN 3,969 | 12.3 yrs |
| 70% | PLN 4,824 | 9.0 yrs |
- Net system cost after incentives: PLN 42,000 for 6 kWp.
- Incentive modelled: No reliable standalone PV grant in 2026 -- Moj Prad closed Sept 2025; KPO replacement funds PV only when BUNDLED with a battery, in short budget-limited rounds..
- 25-year net savings at our default: PLN 70,740.
Best panel angle in Gdańsk
At latitude 54.35°N, PVGIS finds the fixed tilt and direction that maximise yearly output. Our figures use a common 35° roof; the table shows what the optimum adds.
| Setup | Tilt | Facing | kWh per kWp / yr |
|---|---|---|---|
| Standard roof (used on this page) | 35° | south | 1,028 |
| PVGIS optimum | 41° | south (178°) | 1,032 |
The optimum adds 0.4% a year over the standard roof in Gdańsk. Most of a roof's value comes from its direction: a roof facing away from the equator loses far more than a few degrees of tilt.
See the full Poland picture on our Poland solar page, or the national incentives in our Poland solar guide.
Sources and method
Figures computed 2026-09-25 for a 6 kWp system, 35° tilt, 14% system losses, terrain shading on. An estimate, not a quote: your installer's quote will be exact.
- PVGIS 5.3 PVcalc (PVGIS-SARAH3), European Commission JRC (checked 2026-09-25)
- Poland tariff and incentive inputs (see DATA_SOURCES.md) (checked 2026-06-21)
- Poland tariff and incentive inputs (see DATA_SOURCES.md) (checked 2026-06-21)
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