46 places · sun position · panel angle
Solar data for Cambodia
Across the 46 places in Cambodia the best fixed tilt for solar panels runs from 12° in Phnom Penh to 16° in Anlong Veaeng, and flat ground gets 4.8 to 5.3 peak sun hours a day. Every number is computed for each place.
Solar power in Cambodia at a glance
Averages over 46 places with climate data, for a fixed array facing south.
- 4.78–4.88
- 4.88–4.98
- 4.98–5.09
- 5.09–5.19
- 5.19–5.29
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest place in Cambodia is Snuol (Kratie) with 5.29 peak sun hours a day on flat ground; the least sunny is Smach Mean Chey with 4.78. A 1 kWp array at its best angle makes from 1,414 kWh a year in Smach Mean Chey to 1,556 kWh in Snuol — 1,520 kWh on average.
The best year-round tilt runs from 12° in Phnom Penh to 16° in Anlong Veaeng. Off-grid systems are sized for the darkest month and do better steeper, at 6° on average: at 70° that month brings 1.22 kWh per kWp a day in Sihanoukville and 1.55 kWh in Anlong Veaeng.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Cambodia
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.
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 1 | Snuol | Kratie | 5.29 | 1,556 | 14° |
| 2 | Mémót | Tboung Khmum | 5.28 | 1,551 | 13° |
| 2 | Dar | Tboung Khmum | 5.28 | 1,550 | 13° |
| 4 | Kratié | Kratie | 5.27 | 1,552 | 14° |
| 4 | Preaek Prasab | Kratie | 5.27 | 1,552 | 14° |
| 4 | Suong | Tboung Khmum | 5.27 | 1,546 | 13° |
| 4 | Kampong Cham | Kampong Cham | 5.27 | 1,543 | 13° |
| 4 | Prey Veng | Prey Veng | 5.27 | 1,543 | 12° |
| 9 | Phumĭ Âmpĭl Leu | Kampong Cham | 5.26 | 1,543 | 13° |
| 10 | Phnom Penh | Phnom Penh | 5.25 | 1,537 | 12° |
Least sunny places in Cambodia
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 41 | Battambang | Battambang | 5.05 | 1,492 | 14° |
| 43 | Sihanoukville | Preah Sihanouk | 4.92 | 1,446 | 13° |
| 44 | Pailin | Pailin | 4.87 | 1,443 | 15° |
| 45 | Koh Kong | Koh Kong | 4.79 | 1,418 | 14° |
| 46 | Smach Mean Chey | Koh Kong | 4.78 | 1,414 | 14° |
Solar by region in Cambodia
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.
| Region | Places | Sun hours/day | kWh per kWp a year | Best tilt | Darkest month at 70° | Sunniest place |
|---|---|---|---|---|---|---|
| Tboung Khmum | 3 | 5.28 | 1,549 | 13° | 1.37 kWh | Mémót |
| Kratie | 3 | 5.28 | 1,553 | 14° | 1.40 kWh | Snuol |
| Prey Veng | 1 | 5.27 | 1,543 | 12° | 1.35 kWh | Prey Veng |
| Kampong Cham | 2 | 5.27 | 1,543 | 13° | 1.39 kWh | Kampong Cham |
| Kandal | 1 | 5.25 | 1,537 | 12° | 1.36 kWh | Ta Khmau |
| Phnom Penh | 4 | 5.25 | 1,537 | 12° | 1.36 kWh | Phnom Penh |
| Kampong Chhnang | 1 | 5.24 | 1,538 | 13° | 1.39 kWh | Kampong Chhnang |
| Svay Rieng | 2 | 5.23 | 1,529 | 12° | 1.32 kWh | Bavet |
| Kampong Speu Province | 2 | 5.22 | 1,531 | 13° | 1.36 kWh | Phumĭ Véal Tônsay |
| Kampong Thom | 2 | 5.22 | 1,535 | 14° | 1.43 kWh | Kampong Thom |
| Takeo | 5 | 5.19 | 1,521 | 12° | 1.33 kWh | Kandoeng |
| Stung Treng | 1 | 5.19 | 1,538 | 16° | 1.48 kWh | Stung Treng |
| Ŏtâr Méanchey | 2 | 5.19 | 1,539 | 16° | 1.54 kWh | Samraong |
| Siem Reap | 2 | 5.17 | 1,524 | 14° | 1.47 kWh | Yeang |
| Preah Vihear | 1 | 5.15 | 1,529 | 16° | 1.51 kWh | Tbeng Meanchey |
| Ratanakiri | 2 | 5.15 | 1,528 | 16° | 1.45 kWh | Lumphat |
| Kep | 1 | 5.10 | 1,492 | 12° | 1.26 kWh | Kep |
| Pursat | 1 | 5.10 | 1,503 | 13° | 1.38 kWh | Pursat |
| Banteay Meanchey | 3 | 5.09 | 1,507 | 15° | 1.49 kWh | Sisophon |
| Kampot | 1 | 5.07 | 1,486 | 12° | 1.26 kWh | Kampot |
| Battambang | 2 | 5.05 | 1,492 | 14° | 1.43 kWh | Phum Ânlŭng Vĭl |
| Preah Sihanouk | 1 | 4.92 | 1,446 | 13° | 1.22 kWh | Sihanoukville |
| Pailin | 1 | 4.87 | 1,443 | 15° | 1.41 kWh | Pailin |
| Koh Kong | 2 | 4.79 | 1,416 | 14° | 1.26 kWh | Koh Kong |
Largest places in Cambodia at a glance
| Place | Latitude | Best tilt | Off-grid tilt | Sun hours/day (flat) |
|---|---|---|---|---|
| Phnom Penh | 11.6° N | 12° | 7° | 5.25 |
| Takeo | 11.0° N | 12° | 5° | 5.18 |
| Siem Reap | 13.4° N | 14° | 9° | 5.16 |
| Battambang | 13.1° N | 14° | 8° | 5.05 |
| Paoy Paet | 13.7° N | 15° | 9° | 5.06 |
| Dangkao | 11.5° N | 12° | 7° | 5.25 |
| Kampong Chhnang | 12.3° N | 13° | 8° | 5.24 |
| Sihanoukville | 10.6° N | 13° | 1° | 4.92 |
| Preaek Prasab | 12.4° N | 14° | 8° | 5.27 |
| Kampong Cham | 12.0° N | 13° | 7° | 5.27 |
| Anlong Veaeng | 14.2° N | 16° | 9° | 5.18 |
| Pursat | 12.5° N | 13° | 8° | 5.10 |
| Ta Khmau | 11.5° N | 12° | 7° | 5.25 |
| Phumĭ Yoŭl Toŭng | 11.3° N | 12° | 7° | 5.21 |
| Phumĭ Véal Srê | 11.0° N | 12° | 5° | 5.18 |
| Bavet | 11.1° N | 12° | 7° | 5.23 |
| Kep | 10.5° N | 12° | 1° | 5.10 |
| Kandoeng | 11.3° N | 12° | 7° | 5.22 |
| Kampong Speu | 11.5° N | 12° | 7° | 5.22 |
| Koh Kong | 11.6° N | 14° | 0° | 4.79 |
Daylight and clock time in Cambodia
In Anlong Veaeng (14.2° N), the northernmost place, the longest day of the year lasts 12 h 58 min and the shortest 11 h 17 min; in Kep (10.5° N), the southernmost, 12 h 44 min and 11 h 31 min. Cambodia does not use daylight saving time: the clocks stay the same all year.
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Asia/Phnom_Penh | 46 | UTC+7 | no daylight saving time |