Peak Sun Hours in Nawābganj, Rajshahi Division, Bangladesh
- Solar zone
- Zone 3 (good)
- Best month
- April (5.7)
- Worst month
- December (3.2)
- Climate
- Tropical · 25.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.38 | 3.73 | 2.83 | 1.65 | 16.7 | 57 |
| Feb | 4.45 | 4.74 | 3.91 | 1.85 | 21.3 | 47 |
| Mar | 5.34 | 5.76 | 4.31 | 2.15 | 27.0 | 38 |
| Apr | 5.71 | 6.45 | 3.74 | 2.63 | 31.3 | 44 |
| May | 5.50 | 6.62 | 2.92 | 2.86 | 32.3 | 57 |
| Jun | 4.81 | 6.62 | 1.82 | 2.93 | 31.1 | 73 |
| Jul | 4.39 | 6.79 | 1.36 | 2.89 | 29.2 | 85 |
| Aug | 4.61 | 6.56 | 1.75 | 2.91 | 28.7 | 87 |
| Sep | 4.41 | 5.89 | 2.15 | 2.54 | 27.9 | 87 |
| Oct | 4.32 | 5.11 | 3.38 | 1.95 | 25.8 | 81 |
| Nov | 3.97 | 4.21 | 3.98 | 1.58 | 21.6 | 75 |
| Dec | 3.22 | 3.51 | 3.04 | 1.47 | 17.5 | 68 |
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 3.22 kWh/m²/day, 0.77 system efficiency.
About solar in Nawābganj
Nawābganj, Bangladesh has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.51 kWh/m²/day, a good solar resource by global standards.
The strongest month in Nawābganj is April (spring) at 5.71 kWh/m²/day, and the weakest is December (winter) at 3.22 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the December value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Nawābganj'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 Nawābganj?
- Nawābganj averages 4.51 peak sun hours per day annually, ranging from 3.22 in December to 5.71 in April.
- How many solar panels do I need in Nawābganj?
- Panel count depends on your daily load. At Nawābganj's annual average of 4.51 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 Nawābganj?
- Sizing against Nawābganj's worst month (December, 3.22 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 Nawābganj's solar resource compare globally?
- Nawābganj sits in solar zone 3 out of 5 (where 5 is strongest) at 4.51 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.
- How does the wet season affect solar generation in Nawābganj?
- Nawābganj's dry-season output peaks at 5.71 kWh/m²/day in April; the wet season drops it to 3.22 in December. That ~55% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Nawābganj?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Bangladesh, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Nawābganj?
- Nawābganj swings from 5.71 kWh/m²/day in April (dry) to 3.22 in December (wet) — roughly 55%. Year-round off-grid systems must size against the wet-season minimum.