Peak Sun Hours in Huế, Thừa Thiên Huế Province, Vietnam
- Solar zone
- Zone 3 (good)
- Best month
- June (5.5)
- Worst month
- December (2.3)
- Climate
- Tropical · 25.2°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.90 | 5.41 | 2.46 | 1.37 | 20.5 | 88 |
| Feb | 3.86 | 5.95 | 2.93 | 1.72 | 21.4 | 87 |
| Mar | 4.21 | 6.25 | 2.40 | 2.06 | 23.6 | 86 |
| Apr | 4.91 | 6.75 | 2.93 | 2.25 | 26.2 | 82 |
| May | 5.53 | 7.15 | 3.60 | 2.42 | 27.9 | 80 |
| Jun | 5.54 | 7.26 | 3.55 | 2.55 | 28.6 | 77 |
| Jul | 5.24 | 7.30 | 3.19 | 2.45 | 28.4 | 77 |
| Aug | 5.03 | 7.19 | 2.80 | 2.46 | 28.1 | 79 |
| Sep | 4.52 | 6.77 | 2.58 | 2.24 | 27.1 | 83 |
| Oct | 3.61 | 6.07 | 2.12 | 1.85 | 25.4 | 86 |
| Nov | 2.98 | 5.42 | 2.29 | 1.42 | 23.8 | 87 |
| Dec | 2.34 | 5.08 | 1.87 | 1.21 | 21.4 | 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 2.34 kWh/m²/day, 0.77 system efficiency.
About solar in Huế
Huế, Vietnam has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.22 kWh/m²/day, a good solar resource by global standards.
The strongest month in Huế is June (summer) at 5.54 kWh/m²/day, and the weakest is December (winter) at 2.34 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.
Huế'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 Huế?
- Huế averages 4.22 peak sun hours per day annually, ranging from 2.34 in December to 5.54 in June.
- How many solar panels do I need in Huế?
- Panel count depends on your daily load. At Huế's annual average of 4.22 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 Huế?
- Sizing against Huế's worst month (December, 2.34 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 Huế's solar resource compare globally?
- Huế sits in solar zone 3 out of 5 (where 5 is strongest) at 4.22 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 Huế?
- Huế's dry-season output peaks at 5.54 kWh/m²/day in June; the wet season drops it to 2.34 in December. That ~76% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Huế?
- 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 Huế?
- Huế swings from 5.54 kWh/m²/day in June (dry) to 2.34 in December (wet) — roughly 76%. Year-round off-grid systems must size against the wet-season minimum.