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2,095 places · sun position · panel angle

Solar data for China

Across the 2,095 places in China the best fixed tilt for solar panels runs from 14° in Haikou to 52° in Xilinji, and flat ground gets 2.9 to 5.7 peak sun hours a day. Every number is computed for each place.

Solar power in China at a glance

Averages over 2,095 places with climate data, for a fixed array facing south.

Best panel angle28°average, facing south
Peak sun hours3.75a day on flat ground
1 kWp makes1,262kWh a year at the best angle
Off-grid angle41°average, for the darkest month
ShanghaiNyêmo (most sun)
  • 2.91–3.47
  • 3.47–4.04
  • 4.04–4.61
  • 4.61–5.18
  • 5.18–5.75

Peak sun hours a day on flat ground. Each dot is one place (the 900 largest).

The sunniest place in China is Nyêmo (Tibet) with 5.75 peak sun hours a day on flat ground; the least sunny are Baima and 11 other places with 2.91. A 1 kWp array at its best angle makes from 893 kWh a year in Baima to 2,122 kWh in Gar — 1,262 kWh on average.

The best year-round tilt runs from 14° in Haikou to 52° in Xilinji. Off-grid systems are sized for the darkest month and do better steeper, at 41° on average: at 70° that month brings 1.30 kWh per kWp a day in Qinggang and 3.52 kWh in Manzhouli.

Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.

Sunniest places in China

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.

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
1NyêmoTibet5.752,12035°
2GarTibet5.722,12235°
2QuxuTibet5.722,10134°
2DoilungdêqênTibet5.722,10035°
2Chéngguān QūTibet5.722,09935°
6LhasaTibet5.712,09234°
7RikazeTibet5.682,09835°
7DêqênTibet5.682,09435°
7DagzêTibet5.682,07334°
10LhünzhubTibet5.632,06235°

Least sunny places in China

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
2084JiangkouChongqing2.9189719°
2084WulongChongqing2.9189519°
2084HuoluChongqing2.9189519°
2084ChangbaChongqing2.9189319°
2084BaimaChongqing2.9189319°

Solar by region in China

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.

RegionPlacesSun hours/daykWh per kWp a yearBest tiltDarkest month at 70°Sunniest place
Tibet185.502,01334°2.74 kWhNyêmo
Ningxia254.771,75238°2.95 kWhHuinong
Qinghai174.691,76238°2.83 kWhYushu
Xinjiang1104.681,70538°3.09 kWhQiemo
Yunnan1174.491,49128°1.88 kWhRenhe
Inner Mongolia364.391,72943°3.17 kWhDalain Hob
Hainan304.351,29415°1.69 kWhSanya
Shanxi184.171,50136°2.50 kWhYangjiaying
Beijing84.081,51540°2.44 kWhChangping
Hebei404.011,44137°2.39 kWhZhangjiakou
Liaoning513.981,49640°2.52 kWhLingyuan
Guangdong1013.971,21420°1.68 kWhXucheng
Tianjin63.961,42538°2.39 kWhTianjin
Gansu1273.961,37832°2.37 kWhDunhuang
Shandong1773.931,35133°2.28 kWhJiangzhuang
Jilin513.921,53644°2.74 kWhKaitong
China23.921,22223°1.81 kWhShenzhenwan
Heilongjiang753.821,57247°3.01 kWhTailai
Fujian253.821,18922°1.77 kWhXiamen
Jiangsu1553.751,24630°2.11 kWhDaocheng
Shanghai353.711,19026°1.88 kWhBaoshan
Guangxi453.711,12218°1.68 kWhShankou
Shaanxi313.711,24830°2.26 kWhYulinshi
Henan413.701,22730°2.19 kWhAnxiang
Zhejiang403.621,14925°1.77 kWhWenling
Anhui353.601,16627°1.98 kWhTangzhai
Jiangxi293.551,11623°1.76 kWhShangrao
Hubei553.461,10025°1.93 kWhDanjiangkou
Hunan433.251,00321°1.70 kWhChenzhou
Guizhou363.241,00119°1.58 kWhXingyi
Sichuan653.231,01522°1.66 kWhGengqing
Chongqing4513.0694120°1.49 kWhLuoping

Largest places in China at a glance

PlaceLatitudeBest tiltOff-grid tiltSun hours/day (flat)
Shanghai31.2° N26°47°3.72
Beijing39.9° N40°35°4.08
Shenzhen22.5° N20°21°4.10
Guangzhou23.1° N21°21°3.84
Chengdu30.7° N23°33°3.14
Tianjin39.1° N38°40°3.97
Wuhan30.6° N25°48°3.52
Dongguan23.0° N21°21°3.93
Xi’an34.3° N30°38°3.80
Nanjing32.1° N28°47°3.62
Hangzhou30.3° N25°46°3.53
Foshan23.0° N21°20°3.84
Chongqing29.6° N19°45°3.00
Wuzhong38.0° N37°35°4.76
Qingdao36.1° N33°45°3.98
Shenyang41.8° N41°43°3.96
Suzhou31.3° N26°45°3.62
Pudong31.2° N26°47°3.73
Harbin45.8° N46°52°3.86
Hefei31.9° N27°49°3.59

Daylight and clock time in China

In Xilinji (53.0° N), the northernmost place, the longest day of the year lasts 16 h 56 min and the shortest 7 h 34 min; in Sanya (18.3° N), the southernmost, 13 h 14 min and 11 h 02 min. China does not use daylight saving time: the clocks stay the same all year.

Time zonePlacesUTC offsetClocks change in 2026
Asia/Shanghai1,982UTC+8no daylight saving time
Asia/Urumqi109UTC+6no daylight saving time
Asia/Macau4UTC+8no daylight saving time

Questions about solar in China

What is the best angle for solar panels in China?
Facing south, between 14° and 52° depending on the place — 28° on average over 2,095 places. Off-grid systems that must get through the darkest month do better steeper, at about 41° on average.
How many peak sun hours does China get?
From 2.9 hours a day in Baima to 5.7 in Nyêmo on flat ground, averaged over the year; 3.8 on average.
How much electricity does 1 kWp of solar panels produce in China?
About 1,262 kWh a year at the best fixed angle on average, from 893 kWh in Baima to 2,122 kWh in Gar. These are long-term climate averages; a single year can be several per cent higher or lower.
Where is the sunniest place in China?
Nyêmo (Tibet) gets the most sun of the 2,095 places: 5.75 peak sun hours a day on flat ground, so 1 kWp there makes about 2,120 kWh a year.
Does China use daylight saving time?
China does not use daylight saving time: the clocks stay the same all year.
How long is the longest day in China?
16 h 56 min in Xilinji; the shortest day lasts 7 h 34 min in Xilinji.

All places in China

Chongqing