Kermanshah Province · Iran · 34.46° N · 45.86° E
Solar position in Sarpol-e Z̄ahāb
Sun position, daylight and the best solar panel angle for Sarpol-e Z̄ahāb — computed for 34.46° N, 45.86° E, 547 m above sea level.
The sun right now
Sun in Sarpol-e Z̄ahāb today
Saturday, 24 October 2026 · local time UTC+3:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:15 | sun 18° below horizon |
| Nautical dawn | 05:44 | 12° below |
| Civil dawn | 06:13 | 6° below |
| Sunrise | 06:39 | 104° ESE |
| Golden hour ends | 07:13 | sun 6° up |
| Solar noon | 12:10 | 43.7° high |
| Golden hour starts | 17:07 | sun 6° up |
| Sunset | 17:41 | 256° WSW |
| Civil dusk | 18:07 | 6° below |
| Nautical dusk | 18:36 | 12° below |
| Astronomical dusk | 19:05 | 18° below |
| Day length | 11 h 02 min | |
Sun path diagram for Sarpol-e Z̄ahāb
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 79.0° at solar noon in Sarpol-e Z̄ahāb; on the December solstice only 32.1°. Sunrise swings from 61° ENE in June to 118° ESE in December — a 58° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 07:30 | 12:37 | 17:45 | 10 h 14 min | 35.7° |
| February | 07:05 | 12:40 | 18:15 | 11 h 10 min | 45.1° |
| March | 06:29 | 12:33 | 18:38 | 12 h 10 min | 55.8° |
| April | 05:48 | 12:25 | 19:02 | 13 h 15 min | 67.5° |
| May | 05:20 | 12:23 | 19:26 | 14 h 06 min | 75.8° |
| June | 05:14 | 12:28 | 19:42 | 14 h 28 min | 79.0° |
| July | 05:29 | 12:32 | 19:36 | 14 h 07 min | 76.0° |
| August | 05:51 | 12:29 | 19:07 | 13 h 16 min | 67.6° |
| September | 06:13 | 12:19 | 18:25 | 12 h 11 min | 56.2° |
| October | 06:36 | 12:11 | 17:45 | 11 h 08 min | 44.8° |
| November | 07:05 | 12:12 | 17:19 | 10 h 14 min | 35.6° |
| December | 07:29 | 12:24 | 17:20 | 9 h 51 min | 32.1° |
A year of daylight in Sarpol-e Z̄ahāb
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Sarpol-e Z̄ahāb
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
30°collects the most energy over a year: 1769 kWh per kWp.
59°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1569 | 89% | 2.10 | 3.1× |
| 15° | 1720 | 97% | 2.88 | 2.2× |
| 30° year-round best | 1769 | 100% | 3.47 | 1.7× |
| 34° = latitude | 1765 | 100% | 3.59 | 1.6× |
| 45° | 1715 | 97% | 3.84 | 1.4× |
| 59° off-grid best | 1574 | 89% | 3.96 | 1.3× |
| 60° | 1561 | 88% | 3.96 | 1.3× |
| 70° | 1408 | 80% | 3.91 | 1.5× |
| 90° | 1015 | 57% | 3.48 | 2.6× |
A fixed array in Sarpol-e Z̄ahāb produces the most over a year at 30°. The design month for an off-grid system is December: at 59° it makes 3.96 kWh per kWp a day, 14% more than at 30°, and costs 11% of the yearly total. Why steep panels win winter.
Off-grid solar in Sarpol-e Z̄ahāb at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 30° | Mean temp. |
|---|---|---|---|---|---|
| January | 2.76 | 4.40 | 3.91 | 3.58 | 5.0 °C |
| February | 3.66 | 4.68 | 4.12 | 4.20 | 6.7 °C |
| March | 4.91 | 4.89 | 4.23 | 4.92 | 11.3 °C |
| April | 5.88 | 4.30 | 3.64 | 5.06 | 16.5 °C |
| May | 7.11 | 3.98 | 3.28 | 5.44 | 22.8 °C |
| June | 8.33 | 3.84 | 3.08 | 5.84 | 28.9 °C |
| July | 7.89 | 3.98 | 3.15 | 5.61 | 32.3 °C |
| August | 7.27 | 4.65 | 3.69 | 5.64 | 32.0 °C |
| September | 6.23 | 5.54 | 4.50 | 5.60 | 27.5 °C |
| October | 4.47 | 5.34 | 4.45 | 4.71 | 21.2 °C |
| November | 3.24 | 5.06 | 4.37 | 4.07 | 12.0 °C |
| December | 2.57 | 4.44 | 3.91 | 3.47 | 7.0 °C |
| Year | 5.37 avg | 4.59 avg | 1408 kWh | 1769 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 380 Wp of panels at 70°, versus 340 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Sarpol-e Z̄ahāb
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
4.1 mrow pitch at 70°
3.5 mrow pitch at 30°
How Sarpol-e Z̄ahāb compares in Iran
Against the other 422 places in Iran with climate data, for a fixed array at its best angle.
218thof 423 places in Iran for sunshine, shared: 5.37 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Iran: 1,769 against 1,760 kWh per kWp.
−7 mindaylight on the longest day, compared with Tehran: 14 h 28 min against 14 h 35 min.
30°best year-round tilt here; across Iran it runs from 24° in Kīsh to 33° in Khūy.
Of the 423 places in Iran, Jālq gets the most sun (6.10 peak sun hours a day) and Bandar-e Anzalī the least (3.92); Sarpol-e Z̄ahāb ranks joint 218th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.08 kWh a day here, against 2.96 kWh on average in Iran. The shortest day lasts 9 h 51 min, +7 min compared with Tehran.
Solar forecast for Sarpol-e Z̄ahāb, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Sarpol-e Z̄ahāb
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A free, live card for Sarpol-e Z̄ahāb: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.