Haurgeulis, West Java, Indonesia, located at latitude -6.4597 and longitude 107.9433, offers a promising environment for solar energy generation throughout the year. This tropical location benefits from consistent sunlight, with seasons primarily distinguished by wet and dry periods rather than significant temperature variations.
Seasonal Solar Performance
The solar energy output in Haurgeulis remains relatively stable across all seasons, with only minor fluctuations. Spring emerges as the most productive season, generating an average of 5.62 kWh per day for each kilowatt of installed solar capacity. Autumn follows closely with 5.49 kWh/day, while winter produces 5.25 kWh/day. Summer, interestingly, shows the lowest output at 4.58 kWh/day, but this is still a respectable figure.Optimal Panel Positioning
For fixed solar panel installations in Haurgeulis, West Java, the ideal tilt angle to maximize year-round energy production is 7 degrees facing North. This slight tilt helps optimize solar capture throughout the year, accounting for the location's proximity to the equator and the Earth's elliptical orbit.Environmental Considerations
While Haurgeulis presents favorable conditions for solar energy production, there are some environmental factors to consider: 1. Rainfall: The region experiences a tropical monsoon climate, with a distinct rainy season typically occurring from October to April. Heavy rainfall can temporarily reduce solar panel efficiency. 2. Cloud cover: Associated with the rainy season, increased cloud cover can impact solar energy generation. To mitigate these challenges, consider the following preventative measures:Installation Best Practices
1. Use high-quality, water-resistant solar panels designed for tropical climates. 2. Implement a robust cleaning schedule to remove dust and debris, especially after the dry season. 3. Install panels at the recommended 7-degree tilt to facilitate natural cleaning during rainfall and maximize year-round production. 4. Consider a ground-mounted system to allow for easier maintenance and cleaning access. By implementing these measures, solar energy systems in Haurgeulis can maintain high efficiency and productivity throughout the year, capitalizing on the location's abundant sunlight and consistent energy generation potential.Note: The Tropics are located between 23.5° North and -23.5° South of the equator.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 151 locations across Indonesia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Indonesia by location
Solar output per kW of installed solar PV by season in Haurgeulis
Seasonal solar PV output for Latitude: -6.4597, Longitude: 107.9433 (Haurgeulis, Indonesia), 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 7° North in Haurgeulis, Indonesia
To maximize your solar PV system's energy output in Haurgeulis, Indonesia (Lat/Long -6.4597, 107.9433) throughout the year, you should tilt your panels at an angle of 7° North 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 Haurgeulis, Indonesia
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 Haurgeulis, Indonesia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 7° North tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 10° South in Summer | 13° North in Autumn | 22° North in Winter | 1° North 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 Haurgeulis, Indonesia
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 Haurgeulis, Indonesia.
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 Haurgeulis, Indonesia
The topography around Haurgeulis, Indonesia, located at latitude -6.4597 and longitude 107.9433, is characterized by a mix of gently rolling hills and flat lowlands. This area is situated in the northern part of West Java province, relatively close to the northern coast of Java Island. The landscape is primarily composed of agricultural fields, interspersed with small patches of forest and rural settlements. The terrain in this region gradually slopes downward from south to north, with elevations ranging from approximately 50 to 100 meters above sea level near Haurgeulis. As you move further south, the land becomes more undulating, with occasional hills reaching heights of 200 to 300 meters. These hills are part of the broader topographical features that extend across much of Java, forming a backbone of higher elevations running east to west through the island. Rivers and streams crisscross the area, contributing to the region's fertility and supporting the predominantly agricultural economy. The Cimanuk River, one of the major waterways in West Java, flows not far from Haurgeulis, further shaping the local topography and influencing land use patterns.
Suitability for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors come into play. The relatively flat terrain in the immediate vicinity of Haurgeulis offers promising potential for solar PV development. These areas provide ample space for the installation of solar panels without the need for extensive land modifications. The gently sloping agricultural lands to the north of Haurgeulis could be particularly well-suited for solar PV projects. These areas receive good sun exposure throughout the day and are less likely to be shaded by nearby hills or mountains. Additionally, their proximity to existing infrastructure and power distribution networks could facilitate easier integration into the electrical grid. However, it's important to note that the use of productive agricultural land for solar installations may face challenges due to competing land use priorities. Therefore, areas of marginal agricultural value or degraded lands might be more appropriate targets for large-scale solar development. The slightly more elevated areas to the south, while potentially offering good solar exposure, may present some challenges in terms of accessibility and construction. Nevertheless, carefully selected sites on the lower slopes of these hills could provide suitable locations for solar farms, especially if they are oriented to maximize sunlight capture throughout the day. In conclusion, while the topography around Haurgeulis offers several potential sites for large-scale solar PV installations, careful consideration must be given to balancing energy production goals with other land use needs and environmental factors. Detailed site-specific assessments would be necessary to determine the most optimal locations for such projects in this region.Indonesia solar PV Stats as a country
Indonesia ranks 71st in the world for cumulative solar PV capacity, with 211 total MW's of solar PV installed. Each year Indonesia is generating 1 Watts from solar PV per capita (Indonesia ranks 88th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Indonesia?
Yes, there are several incentives for businesses wanting to install solar energy in Indonesia. The Indonesian government has implemented a number of policies and programs to encourage the adoption of renewable energy sources such as solar power. These include tax exemptions, subsidies, feed-in tariffs, and other financial incentives. Additionally, the government has established a Renewable Energy Fund which provides grants for research and development projects related to renewable energy technologies.
Do you have more up to date information than this on incentives towards solar PV projects in Indonesia? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Monday 7th of April 2025
Last Updated: Thursday 24th of July 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

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.




