Peak Sun Hours in Da Nang, Da Nang City, Vietnam
- Solar zone
- Zone 3 (good)
- Best month
- May (6.3)
- Worst month
- December (2.8)
- Climate
- Tropical · 25.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.31 | 5.28 | 2.59 | 1.64 | 21.0 | 87 |
| Feb | 4.36 | 5.95 | 3.38 | 1.93 | 21.7 | 86 |
| Mar | 4.88 | 6.39 | 3.17 | 2.25 | 23.7 | 86 |
| Apr | 5.65 | 6.88 | 3.89 | 2.40 | 26.0 | 84 |
| May | 6.27 | 7.22 | 5.02 | 2.44 | 27.8 | 82 |
| Jun | 6.14 | 7.30 | 4.95 | 2.50 | 28.5 | 79 |
| Jul | 5.89 | 7.33 | 4.62 | 2.43 | 28.4 | 78 |
| Aug | 5.59 | 7.21 | 3.95 | 2.48 | 28.2 | 79 |
| Sep | 5.01 | 6.79 | 3.45 | 2.32 | 27.3 | 83 |
| Oct | 4.23 | 6.06 | 2.68 | 2.15 | 25.7 | 85 |
| Nov | 3.54 | 5.35 | 2.61 | 1.74 | 24.2 | 87 |
| Dec | 2.79 | 4.92 | 1.98 | 1.51 | 21.9 | 87 |
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 2.79 kWh/m²/day, 0.77 system efficiency.
About solar in Da Nang
Da Nang, Vietnam has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.81 kWh/m²/day, a good solar resource by global standards.
The strongest month in Da Nang is May (spring) at 6.27 kWh/m²/day, and the weakest is December (winter) at 2.79 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.
Da Nang'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 Da Nang?
- Da Nang averages 4.81 peak sun hours per day annually, ranging from 2.79 in December to 6.27 in May.
- How many solar panels do I need in Da Nang?
- Panel count depends on your daily load. At Da Nang's annual average of 4.81 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 Da Nang?
- Sizing against Da Nang's worst month (December, 2.79 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 Da Nang's solar resource compare globally?
- Da Nang sits in solar zone 3 out of 5 (where 5 is strongest) at 4.81 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 Da Nang?
- Da Nang's dry-season output peaks at 6.27 kWh/m²/day in May; the wet season drops it to 2.79 in December. That ~72% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Da Nang?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like Vietnam, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Da Nang?
- Da Nang swings from 6.27 kWh/m²/day in May (dry) to 2.79 in December (wet) — roughly 72%. Year-round off-grid systems must size against the wet-season minimum.