Peak Sun Hours in Hāthazāri, Chittagong, Bangladesh
- Solar zone
- Zone 3 (good)
- Best month
- April (6.0)
- Worst month
- December (4.2)
- Climate
- Tropical · 25.5°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 4.45 | 4.81 | 5.31 | 1.48 | 18.4 | 71 |
| Feb | 5.25 | 5.59 | 5.60 | 1.72 | 21.8 | 62 |
| Mar | 5.80 | 6.32 | 4.96 | 2.26 | 26.1 | 63 |
| Apr | 5.96 | 6.89 | 4.13 | 2.71 | 28.4 | 71 |
| May | 5.56 | 7.11 | 3.18 | 2.86 | 28.8 | 79 |
| Jun | 4.60 | 7.11 | 1.97 | 2.75 | 28.4 | 87 |
| Jul | 4.64 | 7.29 | 1.89 | 2.93 | 27.9 | 89 |
| Aug | 4.78 | 7.02 | 2.03 | 2.99 | 27.8 | 89 |
| Sep | 4.68 | 6.47 | 2.62 | 2.64 | 27.8 | 87 |
| Oct | 4.65 | 5.77 | 4.12 | 1.95 | 26.9 | 83 |
| Nov | 4.62 | 5.05 | 5.68 | 1.41 | 23.6 | 79 |
| Dec | 4.20 | 4.55 | 5.35 | 1.35 | 19.8 | 78 |
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 4.20 kWh/m²/day, 0.77 system efficiency.
About solar in Hāthazāri
Hāthazāri, Bangladesh has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.93 kWh/m²/day, a good solar resource by global standards.
The strongest month in Hāthazāri is April (spring) at 5.96 kWh/m²/day, and the weakest is December (winter) at 4.2 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.
Hāthazāri'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 Hāthazāri?
- Hāthazāri averages 4.93 peak sun hours per day annually, ranging from 4.2 in December to 5.96 in April.
- How many solar panels do I need in Hāthazāri?
- Panel count depends on your daily load. At Hāthazāri's annual average of 4.93 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 Hāthazāri?
- Sizing against Hāthazāri's worst month (December, 4.2 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 Hāthazāri's solar resource compare globally?
- Hāthazāri sits in solar zone 3 out of 5 (where 5 is strongest) at 4.93 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 Hāthazāri?
- Hāthazāri's dry-season output peaks at 5.96 kWh/m²/day in April; the wet season drops it to 4.2 in December. That ~36% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Hāthazāri?
- 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 Hāthazāri?
- Hāthazāri swings from 5.96 kWh/m²/day in April (dry) to 4.2 in December (wet) — roughly 36%. Year-round off-grid systems must size against the wet-season minimum.