Peak Sun Hours in Shenzhen, Guangdong, China
- Solar zone
- Zone 3 (good)
- Best month
- July (5.5)
- Worst month
- January (3.1)
- Climate
- Tropical · 23.3°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.10 | 4.41 | 2.53 | 1.56 | 16.0 | 74 |
| Feb | 3.15 | 5.11 | 1.96 | 1.75 | 17.8 | 78 |
| Mar | 3.39 | 5.70 | 1.61 | 1.99 | 20.2 | 79 |
| Apr | 3.97 | 6.42 | 1.93 | 2.24 | 23.3 | 81 |
| May | 4.62 | 7.22 | 2.60 | 2.42 | 26.3 | 84 |
| Jun | 4.76 | 7.43 | 2.77 | 2.51 | 27.9 | 86 |
| Jul | 5.46 | 7.44 | 3.85 | 2.48 | 28.5 | 85 |
| Aug | 5.15 | 7.04 | 3.43 | 2.43 | 28.4 | 84 |
| Sep | 4.79 | 6.36 | 3.30 | 2.26 | 27.6 | 81 |
| Oct | 4.43 | 5.45 | 3.46 | 1.99 | 25.1 | 76 |
| Nov | 3.63 | 4.68 | 3.23 | 1.64 | 21.6 | 75 |
| Dec | 3.18 | 4.16 | 2.91 | 1.50 | 17.1 | 71 |
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 3.10 kWh/m²/day, 0.77 system efficiency.
About solar in Shenzhen
Shenzhen, China has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.14 kWh/m²/day, a good solar resource by global standards.
The strongest month in Shenzhen is July (summer) at 5.46 kWh/m²/day, and the weakest is January (winter) at 3.1 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the January value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Shenzhen'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 Shenzhen?
- Shenzhen averages 4.14 peak sun hours per day annually, ranging from 3.1 in January to 5.46 in July.
- How many solar panels do I need in Shenzhen?
- Panel count depends on your daily load. At Shenzhen's annual average of 4.14 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 Shenzhen?
- Sizing against Shenzhen's worst month (January, 3.1 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 Shenzhen's solar resource compare globally?
- Shenzhen sits in solar zone 3 out of 5 (where 5 is strongest) at 4.14 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 Shenzhen?
- Shenzhen's dry-season output peaks at 5.46 kWh/m²/day in July; the wet season drops it to 3.1 in January. That ~57% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Shenzhen?
- Most tier-1 PV panels are rated for 140+ mph wind loads; mounting hardware usually fails first. In cyclone-prone regions like China, specify IEC 61215-certified panels and anchor-bolt mounts rather than ballasted.
- What's the dry-to-wet output gap in Shenzhen?
- Shenzhen swings from 5.46 kWh/m²/day in July (dry) to 3.1 in January (wet) — roughly 57%. Year-round off-grid systems must size against the wet-season minimum.