Gianyar, Bali, Indonesia, located at latitude -8.5425 and longitude 115.3296, presents a favorable environment for solar energy generation throughout the year. This tropical location benefits from consistent sunlight, with seasonal variations primarily characterized by wet and dry periods rather than significant changes in daylight hours.

Solar Energy Production Potential

The expected electricity output per kilowatt of installed solar capacity in Gianyar is impressive across all meteorological seasons: • Spring: 6.25 kWh/day • Summer: 5.46 kWh/day • Autumn: 6.11 kWh/day • Winter: 5.86 kWh/day These figures indicate a relatively stable solar energy production potential throughout the year, with spring being the most productive season. The minimal variation between seasons suggests that Gianyar is an excellent location for consistent solar energy generation.

Optimal Panel Tilt Angle

For fixed panel installations in Gianyar, Bali, the ideal tilt angle to maximize year-round solar production is 9 degrees North. This angle is calculated based on the location's latitude and accounts for the Earth's elliptical orbit, ensuring optimal exposure to sunlight throughout the year.

Environmental and Weather Considerations

While Gianyar's tropical climate is generally conducive to solar energy production, there are some factors to consider: 1. Rainfall: The wet season, typically occurring from October to April, may lead to increased cloud cover and potentially reduced solar output. However, the impact is usually minimal due to the diffuse light still available. 2. Humidity: High humidity levels can slightly reduce panel efficiency, but this effect is generally negligible. 3. Dust and debris: During the dry season, dust accumulation on panels may occur more frequently, potentially affecting performance. To mitigate these factors, regular cleaning and maintenance of solar panels is recommended, especially during the dry season. Additionally, installing panels at the optimal tilt angle will help maximize energy production and facilitate natural cleaning during rainfall. In conclusion, Gianyar's location in Indonesia provides an excellent opportunity for year-round solar energy generation, with minimal seasonal variations and manageable environmental factors.

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 Gianyar

Seasonal solar PV output for Latitude: -8.5425, Longitude: 115.3296 (Gianyar, 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 9° North in Gianyar, Indonesia

To maximize your solar PV system's energy output in Gianyar, Indonesia (Lat/Long -8.5425, 115.3296) throughout the year, you should tilt your panels at an angle of 9° 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 Gianyar, 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 Gianyar, Indonesia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 9° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
7° South in Summer	15° North in Autumn	24° North in Winter	3° 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 Gianyar, 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 Gianyar, 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 Gianyar, Indonesia

The area around Gianyar, Indonesia, located at -8.5425 latitude and 115.3296 longitude, is characterized by a diverse and picturesque topography. Gianyar is situated on the island of Bali, known for its lush landscapes and varied terrain.

The region surrounding Gianyar features a mix of gently rolling hills, terraced rice paddies, and river valleys. To the north, the land gradually rises towards the central mountains of Bali, with Mount Agung, an active volcano, dominating the northeastern horizon. The southern part of Gianyar slopes down towards the coast, where you'll find beautiful beaches and coastal plains.

Rivers, such as the Pakerisan and Petanu, cut through the landscape, creating scenic gorges and fertile valleys. These waterways have played a crucial role in shaping the terrain and supporting the region's agriculture, particularly its iconic rice terraces.

When considering areas nearby that would be most suited to large-scale solar PV (photovoltaic) installations, several factors come into play. The ideal locations would be relatively flat, open areas with minimal shading from mountains or tall vegetation. Based on these criteria, the following areas near Gianyar might be suitable:

The coastal plains to the south and southeast of Gianyar offer potential for solar PV development. These areas are generally flatter and receive ample sunlight throughout the year. However, care must be taken to avoid ecologically sensitive areas or prime agricultural land.

Some of the more gently sloping hillsides to the north and west of Gianyar could also be considered, particularly if they are not currently used for agriculture or protected as forest land. These elevated areas might benefit from reduced humidity and potentially clearer skies.

It's important to note that while Bali has good solar potential, the island's limited land availability and the importance of preserving its natural beauty and cultural landscapes may pose challenges for large-scale solar PV projects. Any development would need to be carefully planned and implemented with consideration for the local environment, culture, and economy.

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!

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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.