Solar Energy Potential in Bima, West Nusa Tenggara, Indonesia

Bima, West Nusa Tenggara, Indonesia, located at -8.4638, 118.7217, offers excellent conditions for solar energy generation throughout the year. This tropical location benefits from consistent sunlight patterns that make it particularly suitable for photovoltaic (PV) installations. The seasonal solar production data reveals impressive energy generation potential across all seasons. During spring, solar panels can produce their highest output at 6.40 kWh per day for each kilowatt of installed capacity. Summer yields 5.57 kWh/day, autumn provides 5.88 kWh/day, and winter delivers 5.83 kWh/day per kilowatt installed. What stands out about Bima is the relatively small variation between seasons, demonstrating consistent solar potential throughout the year. This steady production pattern is highly advantageous for solar investments, as it ensures reliable energy generation without significant seasonal drops that plague many non-tropical locations.

Optimal Panel Installation

For fixed solar panel installations in Bima, West Nusa Tenggara, the ideal tilt angle is 9 degrees facing North. This specific angle has been calculated to maximize total year-round energy production based on the location's position relative to the sun's path throughout the year. Spring emerges as the most productive season for solar generation in this location, with winter and autumn also providing strong outputs. Even during the relatively less productive summer months, the generation capacity remains robust compared to many other global locations.

Environmental Considerations and Mitigation Strategies

Several environmental factors could potentially impact solar production in Bima:

• Heavy rainfall during the wet season can temporarily reduce solar output due to cloud cover and direct precipitation on panels.
• The tropical climate brings high humidity, which can accelerate corrosion of mounting hardware and electrical components if not properly protected.
• Occasional volcanic ash from Indonesia's active volcanoes may settle on panels, reducing efficiency.
• Tropical storms and high winds, particularly during monsoon seasons, pose physical risks to installations.

To mitigate these challenges, several preventative measures are recommended. Installing corrosion-resistant mounting hardware and sealed junction boxes designed for tropical environments can extend system lifespan. Regular cleaning schedules should be implemented to remove ash deposits and salt buildup, especially after volcanic activity or coastal storms. Additionally, incorporating a slightly steeper tilt than the mathematically optimal 9 degrees can help with self-cleaning during rainfall. Strong mounting systems designed to withstand tropical storm winds are essential, and including surge protection devices will safeguard against lightning strikes common in tropical thunderstorms. Despite these considerations, Bima's consistent solar radiation throughout the year makes it an excellent location for solar PV installations, with annual production levels that would be considered very good by global standards.

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 Bima

Seasonal solar PV output for Latitude: -8.4638, Longitude: 118.7217 (Bima, 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 Bima, Indonesia

To maximize your solar PV system's energy output in Bima, Indonesia (Lat/Long -8.4638, 118.7217) 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 Bima, 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 Bima, 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
8° 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 Bima, 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 Bima, 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 Bima, Indonesia

Bima, located on the eastern part of the island of Sumbawa in Indonesia, presents a diverse topographical landscape characterized by several distinct features. The city itself sits within a natural bay area, surrounded by mountainous terrain that creates a picturesque backdrop to this coastal settlement. The immediate vicinity of Bima showcases a combination of coastal plains and gradually rising elevations. Moving inland from the Bima Bay, the terrain transitions from relatively flat coastal areas to increasingly undulating hills. This geographical arrangement creates natural divisions between the urbanized sections near the coast and the more elevated regions further inland.

Mountain Ranges and Elevated Terrain

A significant topographical feature around Bima is the presence of mountain ranges that form part of the broader volcanic system running through Sumbawa Island. These mountains, while not extremely high compared to other Indonesian peaks, create distinct boundaries and microclimates in the region. The elevated terrain generally increases as one moves away from the coast, with several notable peaks visible from the city. The mountains surrounding Bima contribute to the region's watershed systems, with numerous streams and small rivers flowing from the highlands toward the bay. These waterways have historically shaped the development of settlements and agricultural practices in the area.

Valleys and Lowlands

Between the mountainous formations around Bima lie several valleys and lowland areas. These lower-elevation zones typically feature more fertile soil due to volcanic deposits and alluvial processes over time. The valleys often serve as natural corridors connecting different parts of the region and have traditionally been centers of agricultural activity. The lowland areas nearest to Bima city provide relatively flat expanses that gradually rise into the surrounding hills and mountains. This transitional landscape creates a variety of ecological niches and land-use possibilities within a relatively small geographical area.

Coastal Features

The coastline near Bima presents another important topographical element. The natural harbor of Bima Bay provides sheltered waters that have supported maritime activities for centuries. The coastal areas feature a mix of sandy beaches, mangrove ecosystems in some protected areas, and rocky outcroppings where the mountains meet the sea. The interaction between land and sea has created distinctive coastal landforms, including small peninsulas and inlets that characterize parts of the shoreline around Bima Bay.

Solar PV Suitability

When considering areas around Bima most suited for largescale solar photovoltaic (PV) installations, several factors related to topography become relevant. The most promising locations would include: The inland plains and gently sloping areas to the south and southeast of Bima city offer favorable conditions for solar PV development. These regions provide relatively flat terrain that would minimize the costs associated with land preparation while still receiving abundant sunlight due to their open exposure. Some of the elevated plateaus and terraces found in the hills surrounding Bima also present viable options. These higher-elevation sites often benefit from reduced fog and cloud cover compared to coastal areas, potentially increasing solar energy capture efficiency. The northeastern areas, in particular, combine suitable topography with good solar exposure conditions. Areas where the valleys widen toward the east of Bima provide another potential zone for solar development. These locations offer a balance of flat terrain, accessibility, and distance from the most densely populated urban centers. It's worth noting that while the mountainous regions receive good solar radiation, their steep slopes and difficult access make them less practical for largescale installations. Similarly, the immediate coastal areas, while flat, may face challenges related to land-use competition with urban development and tourism activities. The optimal sites would combine relatively level ground, minimal flooding risk, good road access, and sufficient distance from sensitive ecological areas such as the mangrove ecosystems found along parts of the coastline. Based on topographical considerations alone, the transitional zones between the coastal plains and the foothills, particularly in the eastern and southeastern sectors around Bima, would likely offer the most favorable conditions for largescale solar PV development.

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.