Peak Sun Hours in Zamboanga, Zamboanga Peninsula, Philippines
- Solar zone
- Zone 4 (excellent)
- Best month
- March (5.9)
- Worst month
- June (4.9)
- Climate
- Equatorial · 27.5°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.00 | 6.35 | 3.87 | 2.23 | 27.1 | 82 |
| Feb | 5.57 | 6.80 | 4.30 | 2.28 | 27.2 | 80 |
| Mar | 5.90 | 7.14 | 4.44 | 2.33 | 27.6 | 79 |
| Apr | 5.82 | 7.13 | 4.24 | 2.38 | 28.1 | 77 |
| May | 5.29 | 6.92 | 3.44 | 2.42 | 28.1 | 79 |
| Jun | 4.88 | 6.74 | 2.88 | 2.41 | 27.6 | 81 |
| Jul | 4.89 | 6.77 | 2.86 | 2.42 | 27.3 | 82 |
| Aug | 5.20 | 6.91 | 3.15 | 2.47 | 27.3 | 83 |
| Sep | 5.29 | 6.93 | 3.21 | 2.51 | 27.3 | 82 |
| Oct | 5.21 | 6.69 | 3.50 | 2.36 | 27.5 | 82 |
| Nov | 5.16 | 6.41 | 4.11 | 2.18 | 27.8 | 81 |
| Dec | 4.97 | 6.15 | 4.10 | 2.17 | 27.6 | 81 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
Add appliances
- Add an appliance to size a system.
Sizing
- Daily load
- 0.00 kWh
- Panel wattage
- 0 W
- Panel count (400W modules)
- 0
- Battery bank
- 0.0 kWh
Sizing against worst-month PSH of 4.88 kWh/m²/day, 0.77 system efficiency.
About solar in Zamboanga
Zamboanga, Philippines sits near the equator, where day length is stable year-round and the sun passes close to overhead. Its annual peak sun hours average 5.27 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Zamboanga is March (spring) at 5.9 kWh/m²/day, and the weakest is June (summer) at 4.88 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the June value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Zamboanga's solar conditions are well within the range where off-grid PV is a straightforward engineering exercise with standard-sized arrays and lithium batteries.
FAQ
- What are the peak sun hours in Zamboanga?
- Zamboanga averages 5.27 peak sun hours per day annually, ranging from 4.88 in June to 5.9 in March.
- How many solar panels do I need in Zamboanga?
- Panel count depends on your daily load. At Zamboanga's annual average of 5.27 kWh/m²/day, a 5 kWh/day load needs roughly 4 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Zamboanga?
- Sizing against Zamboanga's worst month (June, 4.88 kWh/m²/day) with 2 days of autonomy at 80% depth of discharge, a 5 kWh/day load needs about a 12.5 kWh battery bank.
- How does Zamboanga's solar resource compare globally?
- Zamboanga sits in solar zone 4 out of 5 (where 5 is strongest) at 5.27 kWh/m²/day — excellent by global standards. For reference, top-tier desert sites average ~6.5 and high-latitude cities around 2.5 kWh/m²/day.
- Why doesn't solar output vary much by month in Zamboanga?
- Near the equator, day length is nearly constant year-round and the sun stays close to overhead. In Zamboanga, monthly PSH ranges just from 4.88 to 5.9 kWh/m²/day — variance is driven by wet-season cloud cover, not day length.
- What tilt angle works best for panels in Zamboanga?
- At latitude 7°, panels in Zamboanga work best at a low tilt (roughly 7°) or horizontal. Tracking mounts add little benefit this close to the equator.
- How does the wet season affect solar output in Zamboanga?
- Equatorial wet seasons reduce output through cloud cover, not day length. Zamboanga's worst month (June) still delivers 4.88 kWh/m²/day — design against this value for reliable year-round off-grid use.