Solar Energy Potential at Jatiluhur, West Java, Indonesia

Jatiluhur, West Java, Indonesia, located at -6.8956, 107.6822, offers excellent conditions for solar PV energy generation throughout the year. This tropical location benefits from consistent sunlight patterns with seasonal variations primarily defined by wet and dry periods rather than dramatic temperature changes. The solar energy production at Jatiluhur shows strong performance across all meteorological seasons. Spring yields the highest output at 5.62 kWh per day for each kilowatt of installed capacity, followed closely by autumn at 5.49 kWh/day. Winter maintains strong production at 5.25 kWh/day, while summer produces 4.60 kWh/day per kilowatt installed. For maximizing year-round solar energy production at this location, fixed solar panels should be installed at an 8-degree tilt facing North. This specific angle has been calculated to optimize energy capture throughout the entire year based on the site's particular latitude and solar patterns.

Environmental and Weather Considerations

Several significant factors may affect solar production at Jatiluhur:

• Heavy rainfall during the wet season (typically October to April) can reduce solar efficiency due to cloud cover and direct precipitation on panels
• High humidity levels throughout the year may cause accelerated degradation of equipment if not properly protected
• Potential volcanic ash from nearby mountains in the Indonesian archipelago could periodically accumulate on panels
• Dust accumulation during the dry season may gradually reduce panel efficiency

Preventative Measures

To maximize solar production despite these challenges, several preventative measures are recommended: Installing panels with self-cleaning technologies or hydrophobic coatings can significantly reduce maintenance needs during the rainy season. Regular cleaning schedules should be implemented during the dry season to remove dust accumulation. Using high-quality, humidity-resistant components with proper IP (Ingress Protection) ratings is essential for longevity in this tropical climate. Additionally, installing robust mounting systems designed to withstand occasional high winds during storm seasons will ensure system stability. Incorporating a slight increase in planned capacity can help compensate for seasonal variations, particularly the somewhat lower output during summer months. This approach ensures more consistent energy supply throughout the year.

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 Jatiluhur

Seasonal solar PV output for Latitude: -6.8956, Longitude: 107.6822 (Jatiluhur, 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 8° North in Jatiluhur, Indonesia

To maximize your solar PV system's energy output in Jatiluhur, Indonesia (Lat/Long -6.8956, 107.6822) throughout the year, you should tilt your panels at an angle of 8° 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 Jatiluhur, 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 Jatiluhur, Indonesia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 8° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
9° 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 Jatiluhur, 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 Jatiluhur, Indonesia.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Jatiluhur, Indonesia

The topography around Jatiluhur, Indonesia presents a diverse and dynamic landscape characteristic of West Java. Located approximately 70 kilometers southeast of Jakarta, Jatiluhur sits within a region defined by its striking elevation changes and water features. The area is dominated by the presence of the Jatiluhur Dam and its resulting reservoir, Jatiluhur Reservoir (also known as Ir. H. Djuanda Reservoir), which creates a significant water body amidst the surrounding terrain. The landscape surrounding Jatiluhur features a combination of rolling hills, valleys, and mountainous terrain. To the south and east, the elevation increases considerably as the land rises toward the volcanic highlands that form Java's spine. These mountains, part of the larger Parahyangan (Priangan) highlands, create a dramatic backdrop to the reservoir and contribute to the region's varied topography. Elevations in the immediate vicinity range from approximately 100 meters above sea level near the reservoir to over 500 meters in the surrounding hills.

Watershed Features

The Jatiluhur area is situated within the Citarum River watershed, one of West Java's most important river systems. The Citarum River flows through the region, having been dammed to create the Jatiluhur Reservoir. This watershed includes numerous tributaries and smaller water bodies that dissect the landscape, creating natural valleys and drainage patterns throughout the region. The reservoir itself occupies a significant depression in the landscape, surrounded by higher terrain on multiple sides. This creates a basin-like formation that influences local climate patterns and land use. The shoreline of the reservoir is irregular, following the contours of the pre-existing valleys that were flooded during the dam's construction.

Soil and Terrain Characteristics

The soils in the Jatiluhur region are generally fertile, derived from volcanic materials that have weathered over time. The terrain varies from relatively flat areas near the reservoir to moderately steep slopes in the surrounding hills. Some areas feature terraced landscapes, particularly where agriculture has shaped the natural topography over generations. Erosion patterns are visible throughout the landscape, with natural drainage channels and gullies cutting through the terrain. These features become more pronounced in areas with steeper slopes, particularly during the wet season when rainfall increases water flow across the landscape.

Areas Suitable for Solar PV Development

When considering large-scale solar photovoltaic (PV) installations near Jatiluhur, several areas present favorable topographic conditions: The gently sloping terrain to the north and northwest of the reservoir offers promising locations for solar development. These areas feature relatively consistent gradients with southern exposures that would receive consistent solar radiation throughout the day. The moderate slopes in these regions also provide natural drainage, reducing the risk of flooding during wet periods. Several plateau-like formations in the surrounding hills, particularly to the east of Jatiluhur, present excellent opportunities for solar PV installations. These elevated flat areas benefit from reduced shading from surrounding terrain and often have sparse vegetation, minimizing the need for extensive land clearing. The areas immediately surrounding the reservoir, particularly on its northern shores, offer interesting potential for solar development. These locations combine favorable topography with proximity to existing infrastructure, including the hydroelectric facilities associated with the dam. This proximity could potentially allow for integration with existing power transmission systems. Areas to avoid include the steeper mountainous terrain to the south and southeast, where installation would be technically challenging and potentially environmentally disruptive. Similarly, the low-lying areas subject to seasonal flooding and the densely vegetated valleys between hills would present significant challenges for large-scale solar development. The most promising zones combine moderate elevation, gentle slopes with southern or western exposure, proximity to existing roads and power infrastructure, and minimal current agricultural use. These characteristics are most commonly found in the transitional areas between the reservoir basin and the higher mountains, forming a rough arc from the northeast to the northwest of Jatiluhur proper.

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

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.