Peru · 18.01° S · 70.25° W
Solar position in Tacna
Sun position, daylight and the best solar panel angle for Tacna — computed for 18.01° S, 70.25° W, 567 m above sea level.
The sun right now
Sun in Tacna today
Saturday, 24 October 2026 · local time UTC−5
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 03:50 | sun 18° below horizon |
| Nautical dawn | 04:17 | 12° below |
| Civil dawn | 04:43 | 6° below |
| Sunrise | 05:06 | 103° ESE |
| Golden hour ends | 05:35 | sun 6° up |
| Solar noon | 11:25 | 83.9° high |
| Golden hour starts | 17:15 | sun 6° up |
| Sunset | 17:44 | 257° WSW |
| Civil dusk | 18:06 | 6° below |
| Nautical dusk | 18:33 | 12° below |
| Astronomical dusk | 18:59 | 18° below |
| Day length | 12 h 39 min | |
Sun path diagram for Tacna
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 48.6° at solar noon in Tacna; on the December solstice only 84.6°. Sunrise swings from 66° ENE in June to 115° ESE in December — a 49° 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 | 05:21 | 11:52 | 18:22 | 13 h 01 min | 88.2° |
| February | 05:37 | 11:54 | 18:11 | 12 h 34 min | 82.4° |
| March | 05:45 | 11:48 | 17:50 | 12 h 06 min | 71.6° |
| April | 05:51 | 11:39 | 17:27 | 11 h 35 min | 60.0° |
| May | 06:01 | 11:37 | 17:13 | 11 h 12 min | 51.7° |
| June | 06:11 | 11:42 | 17:14 | 11 h 03 min | 48.6° |
| July | 06:11 | 11:47 | 17:23 | 11 h 12 min | 51.6° |
| August | 05:56 | 11:44 | 17:31 | 11 h 35 min | 60.1° |
| September | 05:31 | 11:34 | 17:36 | 12 h 05 min | 71.5° |
| October | 05:07 | 11:25 | 17:43 | 12 h 36 min | 82.9° |
| November | 04:55 | 11:26 | 17:58 | 13 h 02 min | 88.0° |
| December | 05:02 | 11:39 | 18:15 | 13 h 13 min | 84.6° |
A year of daylight in Tacna
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 Tacna
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
18°collects the most energy over a year: 1963 kWh per kWp.
26°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 | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1880 | 96% | 3.68 | 1.8× |
| 15° | 1961 | 100% | 4.50 | 1.3× |
| 18° year-round best = latitude | 1963 | 100% | 4.64 | 1.3× |
| 26° off-grid best | 1944 | 99% | 4.93 | 1.2× |
| 30° | 1923 | 98% | 5.04 | 1.2× |
| 45° | 1771 | 90% | 5.27 | 1.5× |
| 60° | 1517 | 77% | 5.16 | 2.1× |
| 70° | 1303 | 66% | 4.90 | 2.9× |
| 90° | 867 | 44% | 3.98 | 3.9× |
A fixed array in Tacna produces the most over a year at 18°. The design month for an off-grid system is June: at 26° it makes 4.93 kWh per kWp a day, 6% more than at 18°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Tacna at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 18° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 18° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.10 | 2.30 | 1.90 | 5.33 | 18.0 °C |
| February | 6.72 | 3.04 | 2.54 | 5.33 | 18.3 °C |
| March | 6.66 | 4.25 | 3.58 | 5.65 | 18.0 °C |
| April | 5.99 | 5.41 | 4.59 | 5.54 | 16.7 °C |
| May | 5.10 | 5.87 | 5.01 | 5.10 | 15.1 °C |
| June | 4.47 | 5.72 | 4.90 | 4.64 | 14.0 °C |
| July | 4.56 | 5.54 | 4.77 | 4.67 | 13.3 °C |
| August | 5.35 | 5.38 | 4.62 | 5.17 | 13.5 °C |
| September | 6.25 | 4.62 | 3.95 | 5.57 | 14.1 °C |
| October | 7.17 | 3.58 | 3.04 | 5.89 | 15.0 °C |
| November | 7.80 | 2.55 | 2.14 | 5.95 | 16.0 °C |
| December | 7.70 | 2.11 | 1.74 | 5.68 | 17.0 °C |
| Year | 6.24 avg | 4.20 avg | 1303 kWh | 1963 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 680 Wp of panels at 70°, versus 250 Wp at 18°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Tacna
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.
2.5 mrow pitch at 70°
2.5 mrow pitch at 18°
How Tacna compares in Peru
Against the other 135 places in Peru with climate data, for a fixed array at its best angle.
14thof 136 places in Peru for sunshine: 6.24 peak sun hours a day on flat ground.
+22%solar energy a year compared with the average place in Peru: 1,963 against 1,605 kWh per kWp.
+23 mindaylight on the longest day, compared with Lima: 13 h 13 min against 12 h 50 min.
18°best year-round tilt here; across Peru it runs from 3° in Tumbes to 19° in Arequipa.
Of the 136 places in Peru, Ciudad Satelite and one other place get the most sun (6.60 peak sun hours a day) and La Peca the least (4.16); Tacna ranks 14th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.74 kWh a day here, against 1.33 kWh on average in Peru. The shortest day lasts 11 h 03 min, −22 min compared with Lima.
Solar forecast for Tacna, 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 Tacna
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Places near Tacna
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A free, live card for Tacna: 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.