126 places · sun position · panel angle
Solar data for Romania
Across the 126 places in Romania the best fixed tilt for solar panels runs from 33° in Mangalia to 39° in Bistriţa, and flat ground gets 3.3 to 3.9 peak sun hours a day. Every number is computed for each place.
Solar power in Romania at a glance
Averages over 126 places with climate data, for a fixed array facing south.
- 3.33–3.45
- 3.45–3.57
- 3.57–3.69
- 3.69–3.81
- 3.81–3.93
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest place in Romania is Mangalia (Constanța County) with 3.93 peak sun hours a day on flat ground; the least sunny are Vişeu de Sus and one other place with 3.33. A 1 kWp array at its best angle makes from 1,222 kWh a year in Sighetu Marmaţiei to 1,358 kWh in Zimnicea — 1,300 kWh on average.
The best year-round tilt runs from 33° in Mangalia to 39° in Bistriţa. Off-grid systems are sized for the darkest month and do better steeper, at 71° on average: at 70° that month brings 1.50 kWh per kWp a day in Satu Mare and 2.28 kWh in Zărnești.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Romania
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 | Mangalia | Constanța County | 3.93 | 1,350 | 33° |
| 2 | Zimnicea | Teleorman County | 3.91 | 1,358 | 34° |
| 2 | Constanţa | Constanța County | 3.91 | 1,350 | 34° |
| 4 | Turnu Măgurele | Teleorman County | 3.90 | 1,356 | 34° |
| 4 | Medgidia | Constanța County | 3.90 | 1,350 | 34° |
| 4 | Năvodari | Constanța County | 3.90 | 1,350 | 34° |
| 7 | Corabia | Olt | 3.89 | 1,355 | 35° |
| 7 | Feteşti | Ialomița County | 3.89 | 1,352 | 34° |
| 7 | Cernavodă | Constanța County | 3.89 | 1,352 | 34° |
| 10 | Giurgiu | Giurgiu County | 3.88 | 1,354 | 35° |
Least sunny places in Romania
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 121 | Rădăuți | Suceava | 3.39 | 1,232 | 38° |
| 123 | Câmpulung Moldovenesc | Suceava | 3.36 | 1,233 | 39° |
| 123 | Sighetu Marmaţiei | Maramureş | 3.36 | 1,222 | 38° |
| 125 | Borşa | Maramureş | 3.33 | 1,229 | 39° |
| 125 | Vişeu de Sus | Maramureş | 3.33 | 1,229 | 39° |
Solar by region in Romania
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 |
|---|---|---|---|---|---|---|
| Constanța County | 5 | 3.91 | 1,350 | 34° | 1.98 kWh | Mangalia |
| Teleorman County | 4 | 3.89 | 1,354 | 35° | 2.07 kWh | Zimnicea |
| Giurgiu County | 1 | 3.88 | 1,354 | 35° | 2.09 kWh | Giurgiu |
| Călărași County | 1 | 3.87 | 1,350 | 35° | 2.08 kWh | Olteniţa |
| Olt | 4 | 3.86 | 1,352 | 35° | 2.11 kWh | Corabia |
| Ialomița County | 3 | 3.85 | 1,345 | 35° | 2.03 kWh | Feteşti |
| Bucharest | 1 | 3.84 | 1,343 | 35° | 2.10 kWh | Bucharest |
| Tulcea County | 1 | 3.84 | 1,338 | 35° | 1.90 kWh | Tulcea |
| Ilfov | 4 | 3.83 | 1,342 | 35° | 2.10 kWh | Popeşti-Leordeni |
| Dolj | 4 | 3.82 | 1,339 | 35° | 2.13 kWh | Craiova |
| Brăila County | 1 | 3.77 | 1,322 | 36° | 2.05 kWh | Brăila |
| Vâlcea County | 2 | 3.74 | 1,334 | 37° | 2.20 kWh | Drăgăşani |
| Dâmbovița County | 3 | 3.73 | 1,330 | 36° | 2.15 kWh | Găeşti |
| Mehedinți County | 1 | 3.72 | 1,314 | 36° | 2.14 kWh | Drobeta-Turnu Severin |
| Buzău County | 2 | 3.71 | 1,316 | 36° | 2.11 kWh | Buzău |
| Arges | 3 | 3.71 | 1,328 | 36° | 2.20 kWh | Piteşti |
| Prahova | 5 | 3.70 | 1,324 | 36° | 2.16 kWh | Mizil |
| Galați County | 2 | 3.70 | 1,307 | 37° | 2.06 kWh | Galaţi |
| Gorj County | 2 | 3.68 | 1,312 | 36° | 2.11 kWh | Motru |
| Timiș County | 2 | 3.65 | 1,291 | 36° | 1.77 kWh | Timişoara |
| Vrancea | 2 | 3.64 | 1,299 | 37° | 2.08 kWh | Focșani |
| Arad County | 1 | 3.64 | 1,285 | 36° | 1.67 kWh | Arad |
| Caraș-Severin County | 3 | 3.63 | 1,292 | 36° | 1.92 kWh | Bocşa |
| Vaslui County | 3 | 3.63 | 1,294 | 37° | 1.93 kWh | Huşi |
| Covasna County | 2 | 3.60 | 1,305 | 38° | 2.17 kWh | Târgu Secuiesc |
| Bacău County | 4 | 3.59 | 1,297 | 38° | 2.09 kWh | Comăneşti |
| Brașov County | 6 | 3.57 | 1,304 | 38° | 2.24 kWh | Braşov |
| Harghita County | 3 | 3.56 | 1,295 | 38° | 2.02 kWh | Miercurea-Ciuc |
| Mureș County | 4 | 3.56 | 1,288 | 38° | 1.99 kWh | Sighișoara |
| Sibiu County | 3 | 3.56 | 1,293 | 38° | 2.14 kWh | Cisnădie |
| Iași County | 2 | 3.55 | 1,275 | 37° | 1.85 kWh | Iaşi |
| Bihor County | 2 | 3.55 | 1,263 | 37° | 1.60 kWh | Salonta |
| Neamț County | 3 | 3.55 | 1,282 | 38° | 1.96 kWh | Roman |
| Hunedoara County | 8 | 3.55 | 1,282 | 37° | 2.10 kWh | Lupeni |
| Alba County | 6 | 3.53 | 1,277 | 37° | 2.02 kWh | Blaj |
| Sălaj County | 2 | 3.51 | 1,255 | 37° | 1.62 kWh | Zalău |
| Cluj County | 5 | 3.50 | 1,264 | 37° | 1.82 kWh | Câmpia Turzii |
| Botoșani County | 2 | 3.48 | 1,254 | 38° | 1.72 kWh | Botoşani |
| Satu Mare County | 2 | 3.45 | 1,233 | 37° | 1.50 kWh | Carei |
| Bistrița-Năsăud County | 1 | 3.43 | 1,257 | 39° | 1.98 kWh | Bistriţa |
| Suceava | 6 | 3.42 | 1,246 | 39° | 1.91 kWh | Fălticeni |
| Maramureş | 5 | 3.38 | 1,233 | 38° | 1.75 kWh | Baia Mare |
Largest places in Romania at a glance
| Place | Latitude | Best tilt | Off-grid tilt | Sun hours/day (flat) |
|---|---|---|---|---|
| Bucharest | 44.4° N | 35° | 69° | 3.84 |
| Iaşi | 47.2° N | 37° | 71° | 3.56 |
| Constanţa | 44.2° N | 34° | 66° | 3.91 |
| Cluj-Napoca | 46.8° N | 37° | 71° | 3.51 |
| Braşov | 45.6° N | 38° | 74° | 3.58 |
| Timişoara | 45.8° N | 36° | 67° | 3.67 |
| Craiova | 44.3° N | 35° | 69° | 3.84 |
| Galaţi | 45.4° N | 36° | 70° | 3.75 |
| Târgu Mureş | 46.5° N | 38° | 74° | 3.56 |
| Oradea | 47.0° N | 37° | 71° | 3.54 |
| Ploieşti | 45.0° N | 36° | 70° | 3.73 |
| Arad | 46.2° N | 36° | 70° | 3.64 |
| Brăila | 45.3° N | 36° | 70° | 3.77 |
| Piteşti | 44.9° N | 36° | 70° | 3.75 |
| Bacău | 46.6° N | 37° | 75° | 3.59 |
| Sibiu | 45.8° N | 38° | 74° | 3.55 |
| Satu Mare | 47.8° N | 37° | 71° | 3.43 |
| Baia Mare | 47.7° N | 37° | 71° | 3.46 |
| Buzău | 45.2° N | 36° | 70° | 3.73 |
| Piatra Neamţ | 46.9° N | 38° | 75° | 3.55 |
Daylight and clock time in Romania
In Dorohoi (48.0° N), the northernmost place, the longest day of the year lasts 16 h 02 min and the shortest 8 h 23 min; in Zimnicea (43.7° N), the southernmost, 15 h 27 min and 8 h 56 min. The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Bucharest).
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Europe/Bucharest | 126 | UTC+2, in summer UTC+3 | Forward on Sun 29 Mar, back on Sun 25 Oct |