Peak Sun Hours in Uyo, Akwa Ibom State, Nigeria
- Solar zone
- Zone 3 (good)
- Best month
- January (5.0)
- Worst month
- July (3.8)
- Climate
- Equatorial · 25.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.04 | 5.56 | 2.73 | 2.71 | 25.6 | 78 |
| Feb | 4.88 | 5.75 | 1.92 | 2.86 | 26.7 | 82 |
| Mar | 4.85 | 6.24 | 1.67 | 2.82 | 26.9 | 87 |
| Apr | 4.92 | 6.65 | 1.93 | 2.75 | 26.8 | 88 |
| May | 4.72 | 6.58 | 2.07 | 2.55 | 26.5 | 89 |
| Jun | 4.19 | 6.28 | 1.50 | 2.41 | 25.6 | 91 |
| Jul | 3.75 | 6.31 | 1.15 | 2.23 | 24.9 | 91 |
| Aug | 3.75 | 6.52 | 1.00 | 2.28 | 24.8 | 91 |
| Sep | 4.09 | 6.81 | 1.20 | 2.44 | 25.1 | 91 |
| Oct | 4.49 | 6.69 | 1.84 | 2.50 | 25.5 | 91 |
| Nov | 4.79 | 6.12 | 2.66 | 2.43 | 26.1 | 88 |
| Dec | 4.98 | 5.57 | 3.11 | 2.48 | 25.9 | 80 |
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 3.75 kWh/m²/day, 0.77 system efficiency.
About solar in Uyo
Uyo, Nigeria sits near the equator, where day length is stable year-round and the sun passes close to overhead. Its annual peak sun hours average 4.54 kWh/m²/day, a good solar resource by global standards.
The strongest month in Uyo is January (winter) at 5.04 kWh/m²/day, and the weakest is July (summer) at 3.75 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the July value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Uyo'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 Uyo?
- Uyo averages 4.54 peak sun hours per day annually, ranging from 3.75 in July to 5.04 in January.
- How many solar panels do I need in Uyo?
- Panel count depends on your daily load. At Uyo's annual average of 4.54 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 Uyo?
- Sizing against Uyo's worst month (July, 3.75 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 Uyo's solar resource compare globally?
- Uyo sits in solar zone 3 out of 5 (where 5 is strongest) at 4.54 kWh/m²/day — good 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 Uyo?
- Near the equator, day length is nearly constant year-round and the sun stays close to overhead. In Uyo, monthly PSH ranges just from 3.75 to 5.04 kWh/m²/day — variance is driven by wet-season cloud cover, not day length.
- What tilt angle works best for panels in Uyo?
- At latitude 5°, panels in Uyo work best at a low tilt (roughly 5°) or horizontal. Tracking mounts add little benefit this close to the equator.
- How does the wet season affect solar output in Uyo?
- Equatorial wet seasons reduce output through cloud cover, not day length. Uyo's worst month (July) still delivers 3.75 kWh/m²/day — design against this value for reliable year-round off-grid use.