Peak Sun Hours in Huizhou, Guangdong, China
- Solar zone
- Zone 2 (moderate)
- Best month
- July (5.0)
- Worst month
- February (3.0)
- Climate
- Tropical · 22.4°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 2.99 | 4.37 | 2.61 | 1.49 | 14.2 | 70 |
| Feb | 2.98 | 5.00 | 1.79 | 1.74 | 16.7 | 73 |
| Mar | 3.07 | 5.49 | 1.29 | 1.91 | 19.7 | 74 |
| Apr | 3.44 | 6.14 | 1.19 | 2.21 | 23.1 | 77 |
| May | 4.01 | 6.93 | 1.58 | 2.45 | 26.1 | 82 |
| Jun | 4.14 | 7.16 | 1.77 | 2.50 | 27.4 | 86 |
| Jul | 5.03 | 7.28 | 2.87 | 2.66 | 28.0 | 85 |
| Aug | 4.87 | 6.82 | 2.64 | 2.59 | 28.0 | 85 |
| Sep | 4.60 | 6.16 | 2.77 | 2.37 | 26.9 | 82 |
| Oct | 4.21 | 5.31 | 3.23 | 1.96 | 23.9 | 75 |
| Nov | 3.49 | 4.60 | 3.21 | 1.59 | 20.2 | 72 |
| Dec | 3.13 | 4.14 | 3.28 | 1.38 | 15.1 | 67 |
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 2.98 kWh/m²/day, 0.77 system efficiency.
About solar in Huizhou
Huizhou, China has a warm, tropical climate with a distinct wet and dry season. Its annual peak sun hours average 3.83 kWh/m²/day, a moderate solar resource by global standards.
The strongest month in Huizhou is July (summer) at 5.03 kWh/m²/day, and the weakest is February (winter) at 2.98 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the February value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Given the moderate resource, Huizhou installations typically oversize panels or combine solar with another source (grid, generator, hydro) for reliability.
FAQ
- What are the peak sun hours in Huizhou?
- Huizhou averages 3.83 peak sun hours per day annually, ranging from 2.98 in February to 5.03 in July.
- How many solar panels do I need in Huizhou?
- Panel count depends on your daily load. At Huizhou's annual average of 3.83 kWh/m²/day, a 5 kWh/day load needs roughly 5 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Huizhou?
- Sizing against Huizhou's worst month (February, 2.98 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 Huizhou's solar resource compare globally?
- Huizhou sits in solar zone 2 out of 5 (where 5 is strongest) at 3.83 kWh/m²/day — moderate 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 Huizhou?
- Huizhou's dry-season output peaks at 5.03 kWh/m²/day in July; the wet season drops it to 2.98 in February. That ~54% swing is a key sizing consideration.
- Can solar panels survive tropical storms in Huizhou?
- 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 Huizhou?
- Huizhou swings from 5.03 kWh/m²/day in July (dry) to 2.98 in February (wet) — roughly 54%. Year-round off-grid systems must size against the wet-season minimum.