Volgograd Oblast · Russia · 48.69° N · 43.53° E
Solar position in Kalach-na-Donu
Sun position, daylight and the best solar panel angle for Kalach-na-Donu — computed for 48.69° N, 43.53° E, 41 m above sea level.
The sun right now
Sun in Kalach-na-Donu today
Saturday, 24 October 2026 · local time UTC+3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:54 | sun 18° below horizon |
| Nautical dawn | 05:30 | 12° below |
| Civil dawn | 06:07 | 6° below |
| Sunrise | 06:39 | 107° ESE |
| Golden hour ends | 07:24 | sun 6° up |
| Solar noon | 11:49 | 29.5° high |
| Golden hour starts | 16:15 | sun 6° up |
| Sunset | 16:59 | 253° WSW |
| Civil dusk | 17:32 | 6° below |
| Nautical dusk | 18:08 | 12° below |
| Astronomical dusk | 18:45 | 18° below |
| Day length | 10 h 20 min | |
Sun path diagram for Kalach-na-Donu
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 64.8° at solar noon in Kalach-na-Donu; on the December solstice only 17.9°. Sunrise swings from 52° NE in June to 126° SE in December — a 74° 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 | 07:48 | 12:17 | 16:46 | 8 h 58 min | 21.5° |
| February | 07:03 | 12:19 | 17:36 | 10 h 33 min | 30.8° |
| March | 06:07 | 12:13 | 18:19 | 12 h 13 min | 41.6° |
| April | 05:04 | 12:04 | 19:05 | 14 h 02 min | 53.2° |
| May | 04:17 | 12:02 | 19:47 | 15 h 30 min | 61.5° |
| June | 04:03 | 12:07 | 20:12 | 16 h 09 min | 64.8° |
| July | 04:25 | 12:12 | 19:58 | 15 h 33 min | 61.7° |
| August | 05:07 | 12:08 | 19:10 | 14 h 03 min | 53.4° |
| September | 05:50 | 11:58 | 18:06 | 12 h 16 min | 42.0° |
| October | 06:34 | 11:50 | 17:05 | 10 h 31 min | 30.6° |
| November | 07:23 | 11:51 | 16:19 | 8 h 57 min | 21.4° |
| December | 07:55 | 12:03 | 16:12 | 8 h 16 min | 17.9° |
A year of daylight in Kalach-na-Donu
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 Kalach-na-Donu
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
38°collects the most energy over a year: 1299 kWh per kWp.
75°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° | 1072 | 83% | 0.56 | 9.4× |
| 15° | 1215 | 94% | 0.83 | 6.6× |
| 30° | 1289 | 99% | 1.07 | 5.0× |
| 38° year-round best | 1299 | 100% | 1.17 | 4.4× |
| 45° | 1290 | 99% | 1.25 | 3.9× |
| 49° = latitude | 1278 | 98% | 1.28 | 3.7× |
| 60° | 1219 | 94% | 1.36 | 3.2× |
| 70° | 1134 | 87% | 1.40 | 2.8× |
| 75° off-grid best | 1082 | 83% | 1.40 | 2.7× |
| 90° | 888 | 68% | 1.36 | 2.3× |
A fixed array in Kalach-na-Donu produces the most over a year at 38°. The design month for an off-grid system is December: at 75° it makes 1.40 kWh per kWp a day, 20% more than at 38°, and costs 17% of the yearly total. Why steep panels win winter.
Off-grid solar in Kalach-na-Donu at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 38° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 38° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.02 | 2.10 | 1.93 | 1.64 | -7.7 °C |
| February snow | 1.96 | 3.28 | 3.02 | 2.75 | -6.5 °C |
| March | 3.11 | 3.82 | 3.44 | 3.63 | 0.5 °C |
| April | 4.54 | 4.28 | 3.73 | 4.43 | 9.1 °C |
| May | 5.91 | 4.42 | 3.73 | 4.98 | 17.0 °C |
| June | 6.57 | 4.37 | 3.61 | 5.10 | 22.0 °C |
| July | 6.30 | 4.40 | 3.59 | 4.95 | 25.0 °C |
| August | 5.63 | 4.82 | 3.96 | 4.96 | 24.2 °C |
| September | 4.05 | 4.68 | 3.96 | 4.34 | 16.9 °C |
| October | 2.32 | 3.53 | 3.08 | 3.01 | 8.4 °C |
| November | 1.12 | 2.10 | 1.87 | 1.69 | 1.0 °C |
| December snow | 0.72 | 1.55 | 1.40 | 1.17 | -4.9 °C |
| Year | 3.61 avg | 3.61 avg | 1134 kWh | 1299 kWh |
Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 840 Wp of panels at 70°, versus 1,010 Wp at 38°. The steep array is 16% smaller for the same winter. Size your own system.
Row spacing in Kalach-na-Donu
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.
7.8 mrow pitch at 70°
6.3 mrow pitch at 38°
How Kalach-na-Donu compares in Russia
Against the other 979 places in Russia with climate data, for a fixed array at its best angle.
212thof 980 places in Russia for sunshine, shared: 3.61 peak sun hours a day on flat ground.
+9%solar energy a year compared with the average place in Russia: 1,299 against 1,196 kWh per kWp.
−1 h 24 mindaylight on the longest day, compared with Moscow: 16 h 09 min against 17 h 34 min.
38°best year-round tilt here; across Russia it runs from 32° in Derbent to 54° in Yakutsk.
Of the 980 places in Russia, Novorossiysk gets the most sun (3.96 peak sun hours a day) and Polyarnyy the least (1.93); Kalach-na-Donu ranks joint 212th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.40 kWh a day here, against 1.31 kWh on average in Russia. The shortest day lasts 8 h 16 min, +1 h 16 min compared with Moscow.
Solar forecast for Kalach-na-Donu, 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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A free, live card for Kalach-na-Donu: 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.