Peak Sun Hours in Warri, Delta, Nigeria
- Solar zone
- Zone 3 (good)
- Best month
- January (4.9)
- Worst month
- July (3.4)
- Climate
- Equatorial · 25.8°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.86 | 5.42 | 2.41 | 2.70 | 25.3 | 80 |
| Feb | 4.57 | 5.55 | 1.64 | 2.68 | 26.7 | 85 |
| Mar | 4.64 | 6.11 | 1.56 | 2.68 | 27.0 | 88 |
| Apr | 4.77 | 6.57 | 1.81 | 2.70 | 26.9 | 90 |
| May | 4.51 | 6.52 | 1.94 | 2.44 | 26.4 | 91 |
| Jun | 3.86 | 6.23 | 1.39 | 2.20 | 25.6 | 91 |
| Jul | 3.38 | 6.27 | 0.95 | 2.04 | 24.9 | 90 |
| Aug | 3.66 | 6.48 | 1.13 | 2.17 | 24.8 | 89 |
| Sep | 3.75 | 6.77 | 1.15 | 2.20 | 25.1 | 91 |
| Oct | 4.29 | 6.65 | 1.83 | 2.35 | 25.6 | 91 |
| Nov | 4.76 | 6.06 | 2.72 | 2.38 | 26.2 | 89 |
| Dec | 4.83 | 5.46 | 2.88 | 2.47 | 25.8 | 83 |
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 3.38 kWh/m²/day, 0.77 system efficiency.
About solar in Warri
Warri, 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 4.32 kWh/m²/day, a good solar resource by global standards.
The strongest month in Warri is January (winter) at 4.86 kWh/m²/day, and the weakest is July (summer) at 3.38 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.
Warri'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 Warri?
- Warri averages 4.32 peak sun hours per day annually, ranging from 3.38 in July to 4.86 in January.
- How many solar panels do I need in Warri?
- Panel count depends on your daily load. At Warri's annual average of 4.32 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 Warri?
- Sizing against Warri's worst month (July, 3.38 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 Warri's solar resource compare globally?
- Warri sits in solar zone 3 out of 5 (where 5 is strongest) at 4.32 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 Warri?
- Near the equator, day length is nearly constant year-round and the sun stays close to overhead. In Warri, monthly PSH ranges just from 3.38 to 4.86 kWh/m²/day — variance is driven by wet-season cloud cover, not day length.
- What tilt angle works best for panels in Warri?
- At latitude 6°, panels in Warri work best at a low tilt (roughly 6°) or horizontal. Tracking mounts add little benefit this close to the equator.
- How does the wet season affect solar output in Warri?
- Equatorial wet seasons reduce output through cloud cover, not day length. Warri's worst month (July) still delivers 3.38 kWh/m²/day — design against this value for reliable year-round off-grid use.