Solarposition.org

Ibaraki · Japan · 36.40° N · 140.53° E

Solar position in Hitachi-Naka

Sun position, daylight and the best solar panel angle for Hitachi-Naka — computed for 36.40° N, 140.53° E, 31 m above sea level.

Sunrise today05:53104° ESE
Sunset today16:49255° WSW
Best panel angle35°year-round, facing south
Off-grid angle44°best for the darkest month

The sun right now

Azimuth180.0°
Elevation41.6°
At solar noon, 11:21Open on the sun map

Sun in Hitachi-Naka today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn04:27sun 18° below horizon
Nautical dawn04:5712° below
Civil dawn05:276° below
Sunrise05:53104° ESE
Golden hour ends06:29sun 6° up
Solar noon11:2141.6° high
Golden hour starts16:14sun 6° up
Sunset16:49255° WSW
Civil dusk17:166° below
Nautical dusk17:4612° below
Astronomical dusk18:1618° below
Day length10 h 56 min

Sun path diagram for Hitachi-Naka

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice56789101112131415161718EquinoxDecember solstice78910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 77.0° at solar noon in Hitachi-Naka; on the December solstice only 30.2°. Sunrise swings from 60° ENE in June to 119° ESE in December — a 59° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:4611:4916:5110 h 05 min33.7°
February06:1911:5117:2411 h 05 min43.0°
March05:4011:4517:5012 h 09 min53.8°
April04:5711:3618:1613 h 19 min65.4°
May04:2711:3418:4214 h 15 min73.8°
June04:2011:3918:5814 h 39 min77.0°
July04:3511:4418:5214 h 17 min74.1°
August05:0011:4118:2113 h 21 min65.7°
September05:2411:3017:3712 h 12 min54.4°
October05:5011:2216:5411 h 05 min43.0°
November06:2011:2316:2610 h 05 min33.7°
December06:4511:3516:269 h 41 min30.2°

A year of daylight in Hitachi-Naka

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Hitachi-Naka

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

35°collects the most energy over a year: 1347 kWh per kWp.

44°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 35°Best worst-month 44°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearOctober kWh/kWp/dayBest ÷ worst month
0°114585%2.462.3×
15°128095%2.881.6×
30°1343100%3.141.4×
35° year-round best1347100%3.181.3×
36° = latitude1347100%3.191.3×
44° off-grid best133299%3.221.3×
45°132999%3.211.3×
60°124092%3.111.6×
70°114385%2.931.8×
90°87365%2.372.7×

A fixed array in Hitachi-Naka produces the most over a year at 35°. The design month for an off-grid system is October: at 44° it makes 3.22 kWh per kWp a day, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Hitachi-Naka at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 35° (year-round best).

012345January: 4.15 (70°)4.2JanFebruary: 3.86 (70°)3.9FebMarch: 3.62 (70°)3.6MarApril: 3.13 (70°)3.1AprMay: 2.67 (70°)2.7MayJune: 2.27 (70°)2.3JunJuly: 2.30 (70°)2.3JulAugust: 2.74 (70°)2.7AugSeptember: 2.80 (70°)2.8SepOctober: 2.93 (70°)2.9OctNovember: 3.35 (70°)3.4NovDecember: 3.78 (70°)3.8Dec35°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 35°Mean temp.
January2.654.634.153.832.1 °C
February3.254.323.863.952.9 °C
March4.074.103.624.186.2 °C
April4.793.643.134.1911.4 °C
May5.133.182.674.0016.6 °C
June4.772.762.273.5220.3 °C
July4.732.842.303.4924.2 °C
August4.883.372.743.8625.4 °C
September3.863.392.803.4521.8 °C
October3.043.462.933.1816.0 °C
November2.523.863.353.2310.3 °C
December2.304.253.783.414.8 °C
Year3.83 avg3.65 avg1143 kWh1347 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 520 Wp of panels at 70°, versus 370 Wp at 35°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Hitachi-Naka

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.

4.4 mrow pitch at 70°

3.9 mrow pitch at 35°

Row spacing calculator

How Hitachi-Naka compares in Japan

Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.

506thof 1,216 places in Japan for sunshine, shared: 3.84 peak sun hours a day on flat ground.

+5%solar energy a year compared with the average place in Japan: 1,347 against 1,284 kWh per kWp.

+4 mindaylight on the longest day, compared with Tokyo: 14 h 39 min against 14 h 35 min.

35°best year-round tilt here; across Japan it runs from 17° in Miyakojima to 41° in Kushiro.

Of the 1,216 places in Japan, Miyakojima gets the most sun (4.34 peak sun hours a day) and Wakkanai and one other place the least (3.17); Hitachi-Naka ranks joint 506th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.27 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 41 min, −4 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Hitachi-Naka, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Hitachi-Naka

What is the best solar panel angle in Hitachi-Naka?
For a fixed array facing south, the best year-round tilt in Hitachi-Naka is 35°, worth about 1347 kWh per kWp a year. An off-grid system that has to get through October does better at about 44°.
What time is sunrise and sunset in Hitachi-Naka today?
On 25 October 2026 the sun rises at 05:53 and sets at 16:49 local time (UTC+9), giving 10 h 56 min of daylight. Solar noon is at 11:21.
How many peak sun hours does Hitachi-Naka get?
On a flat surface 3.8 hours a day averaged over the year, from 2.3 in December to 5.1 in May. Panels tilted at 70° receive 2.8 sun hours a day in June.
How high does the sun get in Hitachi-Naka?
At solar noon the sun stands 77.0° above the horizon on the June solstice and 30.2° on the December solstice.
Is Hitachi-Naka a good place for solar panels?
With 3.8 peak sun hours a day on flat ground, Hitachi-Naka ranks joint 506th of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (35°) makes about 1,347 kWh a year here, 5% more than the average place in Japan.

Places near Hitachi-Naka

All places in Japan

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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.