Solar PV Analysis of Longzhou, China
The location at Longzhou, Zhejiang, China is quite suitable for generating energy via solar photovoltaic (PV) panels year-round. The average daily electricity output per kilowatt (kW) of installed solar varies by season, but it's generally good throughout the year.
In Summer, you can expect to get about 4.82 kilowatt-hours (kWh) of electricity per day for each kW of installed solar power. This reduces slightly in Autumn with an average output of about 4.02 kWh/day per kW and further drops during Winter to about 3.25 kWh/day per kW before increasing again in Spring to around 4.09 kWh/day per kW.
To maximize the total yearly production from the solar PV system at this location, it would be ideal to tilt the panels at an angle of 27 degrees towards the South.
However, local factors such as environmental conditions, topography and weather could potentially affect solar production here.
For instance, if there are many tall buildings or trees that cast shadows on your panels or mountains that block sunlight for part of the day could reduce their effectiveness significantly.
Similarly, heavy cloud cover or smoggy conditions could also reduce the amount of sunlight reaching your panels and thus lower their output.
To overcome these potential obstacles and ensure greater energy production from your system:
1) Choose a site with minimal shading throughout all four seasons.
2) If possible, try installing your panels higher up where they're less likely to be shaded.
3) Regularly clean your panels so dust or dirt doesn't block sunlight.
4) Use high-quality PV modules which can perform well even under less-than-ideal light conditions.
5) Consider using a tracking system that follows sun's path across sky for maximum exposure if budget allows it.
6) Ensure proper maintenance and periodic checks are done on your installation to keep it working efficiently over time.
Remember though that while these measures can help, the specific details of your location and installation might require unique solutions. Always consult with a local solar professional for personalized advice.
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 319 locations across China. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in China by location
Solar output per kW of installed solar PV by season in Longzhou
Seasonal solar PV output for Latitude: 29.0341, Longitude: 119.1541 (Longzhou, China), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:
Ideally tilt fixed solar panels 27° South in Longzhou, China
To maximize your solar PV system's energy output in Longzhou, China (Lat/Long 29.0341, 119.1541) throughout the year, you should tilt your panels at an angle of 27° South for fixed panel installations.
As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.
We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.
Seasonally adjusted solar panel tilt angles for Longzhou, China
If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Longzhou, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 27° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 14° South in Summer | 34° South in Autumn | 45° South in Winter | 21° South in Spring |
Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.
This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.
Calculate solar panel row spacing in Longzhou, China
We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Longzhou, China.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - Minimum Spacing:
We add the shadow length to the horizontal space occupied by tilted panels.
This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.
Topography for solar PV around Longzhou, China
The coordinates provided are actually for Jinhua, Zhejiang Province, not Longzhou. The area around these coordinates is characterized by a mix of urban areas and farmland, with some mountainous terrain to the west and south.
For large-scale solar PV installations, flat or gently sloping areas are generally preferred to minimize installation costs and maximize exposure to sunlight. In this region, the most suitable locations would likely be on cleared land or farmland away from urban centers. However, it's important to consider potential impacts on agricultural activities and local ecosystems.
Solar panels can also be installed on rooftops in urban areas like Jinhua city itself. This might be more feasible considering land use conflicts in China.
Another factor that needs consideration is the climate of the area which affects solar radiation levels received at ground level. The region has a humid subtropical climate with four distinctive seasons: warm spring, hot summer (with heavy rainfall), cool autumn and cold winter which may affect efficiency of solar panels.
Before making any decisions about specific sites for large-scale solar PV projects in this area (or anywhere else), it would be necessary to conduct a detailed site assessment that includes not only topographical analysis but also considerations related to climate, infrastructure access (for construction/maintenance/energy transmission), environmental impact assessments among other factors.
China solar PV Stats as a country
China ranks 1st in the world for cumulative solar PV capacity, with 306,973 total MW's of solar PV installed. This means that 6.20% of China's total energy as a country comes from solar PV (that's 13th in the world). Each year China is generating 217 Watts from solar PV per capita (China ranks 24th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in China?
Yes, there are several incentives for businesses wanting to install solar energy in China. These include subsidies from the Chinese government, preferential tax policies, and access to low-interest loans. Additionally, businesses may be eligible for renewable energy certificates (RECs) which can be sold on the open market for additional income.
Do you have more up to date information than this on incentives towards solar PV projects in China? Please reach out to us and help us keep this information current. Thanks!
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Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 9th of January 2024
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.
However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.
Helping you assess viability of solar PV for your site
Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide
Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.
