Peak Sun Hours in Ashuganj City, Chittagong, Bangladesh
- Solar zone
- Zone 3 (good)
- Best month
- April (5.4)
- Worst month
- December (3.8)
- Climate
- Tropical · 25.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.92 | 4.42 | 4.48 | 1.48 | 17.7 | 65 |
| Feb | 4.79 | 5.21 | 4.92 | 1.78 | 21.4 | 56 |
| Mar | 5.33 | 6.03 | 4.33 | 2.38 | 26.3 | 53 |
| Apr | 5.38 | 6.68 | 3.43 | 2.82 | 28.8 | 67 |
| May | 5.09 | 6.93 | 2.68 | 2.77 | 28.9 | 78 |
| Jun | 4.36 | 7.00 | 1.69 | 2.71 | 28.3 | 88 |
| Jul | 4.51 | 7.13 | 1.77 | 2.85 | 28.1 | 90 |
| Aug | 4.66 | 6.85 | 2.15 | 2.82 | 28.1 | 89 |
| Sep | 4.42 | 6.22 | 2.52 | 2.49 | 27.7 | 88 |
| Oct | 4.44 | 5.48 | 4.05 | 1.81 | 26.1 | 84 |
| Nov | 4.37 | 4.73 | 5.67 | 1.26 | 22.5 | 79 |
| Dec | 3.80 | 4.21 | 5.00 | 1.24 | 18.9 | 74 |
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 3.80 kWh/m²/day, 0.77 system efficiency.
About solar in Ashuganj City
Ashuganj City, Bangladesh has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.59 kWh/m²/day, a good solar resource by global standards.
The strongest month in Ashuganj City is April (spring) at 5.38 kWh/m²/day, and the weakest is December (winter) at 3.8 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.
Ashuganj City'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 Ashuganj City?
- Ashuganj City averages 4.59 peak sun hours per day annually, ranging from 3.8 in December to 5.38 in April.
- How many solar panels do I need in Ashuganj City?
- Panel count depends on your daily load. At Ashuganj City's annual average of 4.59 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 Ashuganj City?
- Sizing against Ashuganj City's worst month (December, 3.8 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 Ashuganj City's solar resource compare globally?
- Ashuganj City sits in solar zone 3 out of 5 (where 5 is strongest) at 4.59 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 Ashuganj City?
- Ashuganj City's dry-season output peaks at 5.38 kWh/m²/day in April; the wet season drops it to 3.8 in December. That ~34% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Ashuganj City?
- 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 Ashuganj City?
- Ashuganj City swings from 5.38 kWh/m²/day in April (dry) to 3.8 in December (wet) — roughly 34%. Year-round off-grid systems must size against the wet-season minimum.