Peak Sun Hours in Zhongshan, Guangdong, China
- Solar zone
- Zone 3 (good)
- Best month
- July (5.4)
- Worst month
- January (3.0)
- Climate
- Tropical · 22.9°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 3.04 | 4.43 | 2.47 | 1.55 | 14.7 | 73 |
| Feb | 3.14 | 5.14 | 2.02 | 1.75 | 17.4 | 76 |
| Mar | 3.33 | 5.72 | 1.55 | 1.99 | 20.5 | 76 |
| Apr | 3.81 | 6.41 | 1.73 | 2.23 | 24.0 | 79 |
| May | 4.56 | 7.21 | 2.44 | 2.46 | 26.7 | 83 |
| Jun | 4.70 | 7.43 | 2.52 | 2.59 | 27.9 | 87 |
| Jul | 5.43 | 7.47 | 3.63 | 2.58 | 28.3 | 87 |
| Aug | 5.06 | 7.04 | 3.22 | 2.47 | 28.3 | 86 |
| Sep | 4.65 | 6.35 | 3.05 | 2.29 | 27.1 | 84 |
| Oct | 4.36 | 5.46 | 3.39 | 2.00 | 24.0 | 79 |
| Nov | 3.59 | 4.70 | 3.23 | 1.63 | 20.3 | 76 |
| Dec | 3.19 | 4.19 | 2.95 | 1.50 | 15.5 | 70 |
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 3.04 kWh/m²/day, 0.77 system efficiency.
About solar in Zhongshan
Zhongshan, China has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 4.07 kWh/m²/day, a good solar resource by global standards.
The strongest month in Zhongshan is July (summer) at 5.43 kWh/m²/day, and the weakest is January (winter) at 3.04 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.
Zhongshan'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 Zhongshan?
- Zhongshan averages 4.07 peak sun hours per day annually, ranging from 3.04 in January to 5.43 in July.
- How many solar panels do I need in Zhongshan?
- Panel count depends on your daily load. At Zhongshan's annual average of 4.07 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 Zhongshan?
- Sizing against Zhongshan's worst month (January, 3.04 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 Zhongshan's solar resource compare globally?
- Zhongshan sits in solar zone 3 out of 5 (where 5 is strongest) at 4.07 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 Zhongshan?
- Zhongshan's dry-season output peaks at 5.43 kWh/m²/day in July; the wet season drops it to 3.04 in January. That ~59% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Zhongshan?
- 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 Zhongshan?
- Zhongshan swings from 5.43 kWh/m²/day in July (dry) to 3.04 in January (wet) — roughly 59%. Year-round off-grid systems must size against the wet-season minimum.