59 places · sun position · panel angle
Solar data for Slovakia
Across the 59 places in Slovakia the best fixed tilt for solar panels runs from 37° in Bratislava to 39° in Prešov, and flat ground gets 3.0 to 3.4 peak sun hours a day. Every number is computed for each place.
Solar power in Slovakia at a glance
Averages over 59 places with climate data, for a fixed array facing south.
- 3.03–3.11
- 3.11–3.18
- 3.18–3.26
- 3.26–3.34
- 3.34–3.41
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest place in Slovakia is Komárno (Nitra Region) with 3.41 peak sun hours a day on flat ground; the least sunny is Čadca with 3.03. A 1 kWp array at its best angle makes from 1,104 kWh a year in Čadca to 1,220 kWh in Komárno — 1,169 kWh on average.
The best year-round tilt runs from 37° in Bratislava to 39° in Prešov. Off-grid systems are sized for the darkest month and do better steeper, at 74° on average: at 70° that month brings 1.43 kWh per kWp a day in Trebišov and 1.59 kWh in Zvolen.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Slovakia
Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 1 | Komárno | Nitra Region | 3.41 | 1,220 | 37° |
| 2 | Nové Zámky | Nitra Region | 3.37 | 1,208 | 37° |
| 2 | Dunajská Streda | Trnava Region | 3.37 | 1,204 | 37° |
| 4 | Petržalka | Bratislava Region | 3.35 | 1,198 | 37° |
| 4 | Podunajské Biskupice | Bratislava Region | 3.35 | 1,198 | 37° |
| 4 | Vrakuňa | Bratislava Region | 3.35 | 1,197 | 37° |
| 7 | Komárno | Nitra Region | 3.34 | 1,201 | 38° |
| 7 | Šaľa | Nitra Region | 3.34 | 1,198 | 38° |
| 7 | Bratislava | Bratislava Region | 3.35 | 1,197 | 37° |
| 7 | Karlova Ves | Bratislava Region | 3.34 | 1,197 | 37° |
Least sunny places in Slovakia
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 54 | Považská Bystrica | Trenčín Region | 3.11 | 1,129 | 39° |
| 56 | Stará Ľubovňa | Prešov Region | 3.11 | 1,132 | 39° |
| 57 | Dolný Kubín | Žilina Region | 3.08 | 1,124 | 39° |
| 57 | Žilina | Žilina Region | 3.08 | 1,121 | 39° |
| 59 | Čadca | Žilina Region | 3.03 | 1,104 | 39° |
Solar by region in Slovakia
Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.
| Region | Places | Sun hours/day | kWh per kWp a year | Best tilt | Darkest month at 70° | Sunniest place |
|---|---|---|---|---|---|---|
| Bratislava Region | 10 | 3.34 | 1,194 | 37° | 1.53 kWh | Petržalka |
| Nitra Region | 7 | 3.34 | 1,198 | 38° | 1.54 kWh | Komárno |
| Trnava Region | 8 | 3.30 | 1,182 | 38° | 1.50 kWh | Dunajská Streda |
| Banská Bystrica Region | 6 | 3.24 | 1,175 | 38° | 1.57 kWh | Rimavská Sobota |
| Košice Region | 5 | 3.23 | 1,169 | 38° | 1.48 kWh | Rožňava |
| Trenčín Region | 9 | 3.18 | 1,151 | 38° | 1.51 kWh | Partizánske |
| Prešov Region | 8 | 3.15 | 1,146 | 39° | 1.47 kWh | Vranov nad Topľou |
| Žilina Region | 6 | 3.09 | 1,125 | 39° | 1.53 kWh | Liptovský Mikuláš |
Largest places in Slovakia at a glance
| Place | Latitude | Best tilt | Off-grid tilt | Sun hours/day (flat) |
|---|---|---|---|---|
| Bratislava | 48.1° N | 37° | 72° | 3.35 |
| Košice | 48.7° N | 38° | 76° | 3.24 |
| Petržalka | 48.1° N | 37° | 72° | 3.35 |
| Nitra | 48.3° N | 38° | 72° | 3.31 |
| Prešov | 49.0° N | 39° | 76° | 3.17 |
| Žilina | 49.2° N | 39° | 76° | 3.08 |
| Banská Bystrica | 48.7° N | 38° | 76° | 3.20 |
| Trnava | 48.4° N | 37° | 72° | 3.31 |
| Trenčín | 48.9° N | 38° | 72° | 3.19 |
| Martin | 49.1° N | 39° | 76° | 3.12 |
| Poprad | 49.1° N | 38° | 76° | 3.15 |
| Prievidza | 48.8° N | 38° | 72° | 3.19 |
| Zvolen | 48.6° N | 38° | 76° | 3.24 |
| Považská Bystrica | 49.1° N | 39° | 76° | 3.11 |
| Nové Zámky | 48.0° N | 37° | 72° | 3.37 |
| Michalovce | 48.8° N | 38° | 76° | 3.22 |
| Karlova Ves | 48.2° N | 37° | 72° | 3.34 |
| Dúbravka | 48.2° N | 37° | 72° | 3.34 |
| Spišská Nová Ves | 48.9° N | 38° | 76° | 3.18 |
| Komárno | 48.1° N | 38° | 72° | 3.34 |
Daylight and clock time in Slovakia
In Čadca (49.4° N), the northernmost place, the longest day of the year lasts 16 h 17 min and the shortest 8 h 10 min; in Komárno (47.8° N), the southernmost, 16 h 01 min and 8 h 24 min. The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Bratislava).
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Europe/Bratislava | 59 | UTC+1, in summer UTC+2 | Forward on Sun 29 Mar, back on Sun 25 Oct |