Peak Sun Hours in Bhatara, Dhaka Division, Bangladesh
- Solar zone
- Zone 3 (good)
- Best month
- April (5.5)
- Worst month
- December (3.5)
- Climate
- Tropical · 25.5°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.62 | 4.04 | 3.22 | 1.69 | 17.6 | 64 |
| Feb | 4.60 | 4.93 | 4.00 | 1.95 | 21.7 | 54 |
| Mar | 5.29 | 5.84 | 4.00 | 2.38 | 26.7 | 50 |
| Apr | 5.50 | 6.45 | 3.30 | 2.86 | 29.6 | 64 |
| May | 5.24 | 6.67 | 2.60 | 2.91 | 29.6 | 75 |
| Jun | 4.44 | 6.76 | 1.57 | 2.83 | 28.8 | 87 |
| Jul | 4.38 | 6.99 | 1.63 | 2.83 | 28.4 | 89 |
| Aug | 4.55 | 6.76 | 1.85 | 2.88 | 28.2 | 89 |
| Sep | 4.33 | 6.14 | 2.11 | 2.62 | 27.8 | 89 |
| Oct | 4.39 | 5.42 | 3.46 | 2.02 | 26.1 | 84 |
| Nov | 4.21 | 4.57 | 4.53 | 1.56 | 22.5 | 78 |
| Dec | 3.52 | 3.90 | 3.64 | 1.48 | 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 3.52 kWh/m²/day, 0.77 system efficiency.
About solar in Bhatara
Bhatara, 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 Bhatara is April (spring) at 5.5 kWh/m²/day, and the weakest is December (winter) at 3.52 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.
Bhatara'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 Bhatara?
- Bhatara averages 4.51 peak sun hours per day annually, ranging from 3.52 in December to 5.5 in April.
- How many solar panels do I need in Bhatara?
- Panel count depends on your daily load. At Bhatara'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 Bhatara?
- Sizing against Bhatara's worst month (December, 3.52 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 Bhatara's solar resource compare globally?
- Bhatara 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 Bhatara?
- Bhatara's dry-season output peaks at 5.5 kWh/m²/day in April; the wet season drops it to 3.52 in December. That ~44% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Bhatara?
- 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 Bhatara?
- Bhatara swings from 5.5 kWh/m²/day in April (dry) to 3.52 in December (wet) — roughly 44%. Year-round off-grid systems must size against the wet-season minimum.