Peak Sun Hours in Isiro, Haut-Uele, Democratic Republic of the Congo
- Solar zone
- Zone 4 (excellent)
- Best month
- February (5.6)
- Worst month
- July (4.4)
- Climate
- Tropical · 23.3°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 5.59 | 6.52 | 3.86 | 2.55 | 23.5 | 73 |
| Feb | 5.64 | 6.85 | 3.55 | 2.66 | 24.8 | 73 |
| Mar | 5.46 | 7.08 | 2.95 | 2.72 | 24.4 | 83 |
| Apr | 5.37 | 7.16 | 3.09 | 2.62 | 23.7 | 89 |
| May | 5.27 | 6.87 | 3.20 | 2.53 | 23.4 | 90 |
| Jun | 4.53 | 6.38 | 2.11 | 2.45 | 22.9 | 89 |
| Jul | 4.42 | 6.28 | 1.84 | 2.45 | 22.8 | 88 |
| Aug | 4.56 | 6.71 | 2.00 | 2.46 | 22.8 | 88 |
| Sep | 5.27 | 7.16 | 2.87 | 2.54 | 22.9 | 89 |
| Oct | 5.12 | 7.16 | 2.86 | 2.48 | 22.8 | 91 |
| Nov | 5.09 | 6.76 | 3.20 | 2.39 | 22.9 | 89 |
| Dec | 5.27 | 6.41 | 3.61 | 2.43 | 23.2 | 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 4.42 kWh/m²/day, 0.77 system efficiency.
About solar in Isiro
Isiro, Democratic Republic of the Congo has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 5.13 kWh/m²/day, a excellent solar resource by global standards.
The strongest month in Isiro is February (winter) at 5.64 kWh/m²/day, and the weakest is July (summer) at 4.42 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.
Isiro'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 Isiro?
- Isiro averages 5.13 peak sun hours per day annually, ranging from 4.42 in July to 5.64 in February.
- How many solar panels do I need in Isiro?
- Panel count depends on your daily load. At Isiro's annual average of 5.13 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 Isiro?
- Sizing against Isiro's worst month (July, 4.42 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 Isiro's solar resource compare globally?
- Isiro sits in solar zone 4 out of 5 (where 5 is strongest) at 5.13 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.
- How does the wet season affect solar generation in Isiro?
- Isiro's dry-season output peaks at 5.64 kWh/m²/day in February; the wet season drops it to 4.42 in July. That ~24% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Isiro?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Democratic Republic of the Congo, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Isiro?
- Isiro swings from 5.64 kWh/m²/day in February (dry) to 4.42 in July (wet) — roughly 24%. Year-round off-grid systems must size against the wet-season minimum.