Surakarta, Central Java, Indonesia, located at latitude -7.5533 and longitude 110.831, 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.

The solar energy potential in Surakarta remains relatively stable across all meteorological seasons, with only slight variations in daily electricity output per kilowatt of installed solar capacity:

• Spring: 5.73 kWh/day
• Summer: 4.94 kWh/day
• Autumn: 5.57 kWh/day
• Winter: 5.52 kWh/day

Interestingly, the spring and autumn months show the highest potential for solar energy production, while summer experiences a slight dip. This pattern is likely due to the region's tropical climate, where increased cloud cover and rainfall during the summer monsoon season may temporarily reduce solar irradiance.

Optimal Panel Installation

For fixed solar panel installations in Surakarta, Central Java, the ideal tilt angle to maximize year-round energy production is 8 degrees facing North. This slight tilt helps optimize the panels' exposure to sunlight throughout the year, accounting for the city's proximity to the equator and the Earth's elliptical orbit.

Environmental Considerations

While Surakarta's location is generally favorable for solar energy production, there are some environmental factors to consider. The region's tropical climate means high humidity and frequent rainfall, particularly during the wet season. These conditions can potentially impact solar panel efficiency and longevity.

To mitigate these challenges, several preventative measures can be implemented during solar installation:

1. Use high-quality, weather-resistant solar panels designed for tropical climates
2. Install adequate drainage systems to prevent water accumulation on panels
3. Implement regular cleaning and maintenance schedules to remove dust and debris
4. Consider elevated mounting systems to reduce exposure to ground-level moisture

By addressing these factors, solar installations in Surakarta can maximize their energy production potential and ensure long-term reliability, making the most of the region's abundant solar resources.

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 Surakarta

Seasonal solar PV output for Latitude: -7.5533, Longitude: 110.831 (Surakarta, 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:

Average 4.94kWh/day in Summer.

Average 5.57kWh/day in Autumn.

Average 5.52kWh/day in Winter.

Average 5.73kWh/day in Spring.

Ideally tilt fixed solar panels 8° North in Surakarta, Indonesia

To maximize your solar PV system's energy output in Surakarta, Indonesia (Lat/Long -7.5533, 110.831) 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.

At Latitude: -7.5533, Longitude: 110.831, the ideal angle to tilt panels is 8° North

Seasonally adjusted solar panel tilt angles for Surakarta, 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 Surakarta, Indonesia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 8° North tilt angle throughout the year.

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 Surakarta, 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 Surakarta, 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 Surakarta, Indonesia

The topography around Surakarta, Indonesia, also known as Solo, is characterized by a mix of urban areas and surrounding rural landscapes. The city itself sits in a relatively flat basin, with an average elevation of about 95 meters (312 feet) above sea level. This low-lying area is part of the Solo River valley, which runs through the region.

As you move away from the city center, the terrain becomes more varied. To the north and south of Surakarta, the land gradually rises into gently rolling hills. These hills are often used for agriculture, with terraced fields being a common sight. The southern part of the region, in particular, becomes more hilly as it approaches the foothills of Mount Lawu, a dormant volcano that dominates the southeastern horizon.

To the east and west, the landscape remains relatively flat for some distance, following the course of the Solo River. This area is primarily used for rice cultivation, with expansive paddy fields stretching across the horizon. The flat terrain in these directions continues for several kilometers before eventually giving way to more varied topography.

For large-scale solar PV installations, the areas most suited would likely be the flat, open spaces to the east and west of Surakarta. These regions offer several advantages:

1. They have minimal shading from hills or mountains, allowing for maximum sun exposure throughout the day.
2. The flat terrain makes construction and maintenance of solar arrays easier and more cost-effective.
3. These areas are often already used for agriculture, so repurposing some land for solar farms may be more feasible than in more densely populated or forested areas.
4. The proximity to the city means easier connection to existing power infrastructure.

However, it's important to note that these areas are also valuable agricultural land, so any large-scale solar development would need to carefully balance energy production with food security concerns. Additionally, site-specific surveys would be necessary to determine the exact suitability of any location, taking into account factors such as local climate patterns, soil conditions, and proximity to power transmission infrastructure.

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.

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