Gresik, East Java, Indonesia, located at latitude -7.1511 and longitude 112.6611, offers a promising environment for solar energy generation throughout the year. This tropical location experiences consistent sunlight, with seasons primarily characterized by wet and dry periods rather than temperature variations.

Year-round Solar Potential

The solar energy output in Gresik remains relatively stable across all seasons, with only slight variations: Spring sees the highest production at 5.88 kWh per day for each kW of installed solar capacity. Winter follows closely with 5.62 kWh/day, while autumn yields 5.58 kWh/day. Summer, interestingly, has the lowest output at 4.99 kWh/day, though still substantial. This consistency in solar production throughout the year makes Gresik an ideal location for solar PV installations. The minimal fluctuation between seasons ensures a reliable energy supply, reducing the need for extensive energy storage solutions.

Optimal Panel Tilt

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

Environmental Considerations

While Gresik's tropical climate is generally favorable for solar energy production, there are some environmental factors to consider: 1. High humidity: The tropical climate can lead to increased humidity, potentially affecting solar panel efficiency. 2. Heavy rainfall: During the wet season, frequent rain might temporarily reduce solar output. To mitigate these factors, consider the following preventative measures: - Use high-quality, weather-resistant solar panels designed for tropical climates. - Implement regular cleaning and maintenance schedules to prevent dust and debris accumulation. - Install panels at the recommended 8-degree tilt to facilitate natural cleaning during rainfall. - Employ anti-reflective coatings on panels to maximize light absorption, even in overcast conditions. Overall, Gresik's location offers excellent potential for solar energy generation, with consistent year-round output and manageable environmental challenges. With proper planning and maintenance, solar PV installations in this area can provide a reliable and sustainable energy source.

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 Gresik

Seasonal solar PV output for Latitude: -7.1511, Longitude: 112.6611 (Gresik, 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 Gresik, Indonesia

To maximize your solar PV system's energy output in Gresik, Indonesia (Lat/Long -7.1511, 112.6611) 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 Gresik, 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 Gresik, 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	14° North in Autumn	23° North in Winter	2° 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 Gresik, 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 Gresik, 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 Gresik, Indonesia

The topography around Gresik, Indonesia, located at approximately 7.15°S latitude and 112.66°E longitude, is characterized by a diverse landscape that includes both coastal and inland features. Situated on the northern coast of East Java, Gresik is primarily a low-lying area with relatively flat terrain near the shoreline. As you move inland, the landscape gradually transitions to gently rolling hills and small elevations. The coastal region of Gresik consists of mudflats, mangrove forests, and sandy beaches. These areas are often subject to tidal influences and have a relatively high water table. Moving away from the coast, the terrain becomes slightly more elevated, with occasional small hills and shallow valleys. The soil in this region is generally fertile, supporting agriculture and various vegetation types.

Suitable Areas for Large-Scale Solar PV

When considering areas nearby Gresik for large-scale solar photovoltaic (PV) installations, several factors come into play. The most suitable locations would be those with ample sunlight exposure, minimal shading, and relatively flat terrain to reduce installation costs and maximize efficiency. The inland areas to the south and southeast of Gresik present promising opportunities for solar PV development. These regions feature more open spaces with fewer obstructions, allowing for optimal solar panel placement. The gently rolling hills in these areas can provide natural elevation, potentially increasing sun exposure throughout the day. Another potential area for solar PV installations could be the reclaimed coastal lands or unused industrial zones near the port of Gresik. These flat, open spaces could be repurposed for solar energy production, taking advantage of the abundant sunlight in the coastal region. It's important to note that while the immediate vicinity of Gresik offers some suitable locations, expanding the search radius to neighboring regencies might yield even more favorable sites for large-scale solar PV projects. Areas further inland, away from the coastal influence, may experience less cloud cover and humidity, potentially increasing solar energy generation efficiency. When planning solar PV installations in this region, it's crucial to consider environmental factors such as the impact on local ecosystems, particularly in areas near mangrove forests or agricultural lands. Additionally, the proximity to existing power infrastructure and the local electricity demand should be taken into account to ensure the viability and effectiveness of any large-scale solar energy project in the Gresik area.

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.

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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.