Leganes, Western Visayas, Philippines represents an excellent location for year-round solar energy generation, offering consistently strong solar output throughout all seasons due to its tropical climate and strategic positioning.

Solar Energy Performance

The solar energy production data for Leganes shows impressive consistency across the year. Spring delivers the highest output at 6.49kWh per day for each kilowatt of installed solar capacity, making it the peak season for solar generation. Summer follows closely with 5.65kWh/day, while autumn produces 5.16kWh/day. Even during winter, the weakest performing season, the location still generates a respectable 4.90kWh/day per kilowatt installed. This tropical location benefits from abundant sunlight year-round, with seasonal variations being relatively modest compared to temperate regions. The difference between the best and worst performing seasons is only about 1.6kWh/day per kilowatt, demonstrating remarkable stability for solar energy planning.

Optimal Panel Configuration

For maximum year-round solar production at Leganes, Western Visayas, solar panels should be installed at a fixed tilt angle of 10 degrees facing south. This relatively shallow angle is typical for locations close to the equator and helps optimize energy capture across all seasons while accounting for the sun's path throughout the year.

Environmental Challenges and Solutions

Several environmental factors in Leganes could potentially impact solar energy production, though the location remains highly suitable for solar installations:

• Monsoon rains and high humidity: The tropical climate brings heavy rainfall during wet seasons and consistently high humidity levels
• Typhoon exposure: The Philippines regularly experiences tropical storms and typhoons that can damage solar installations
• Salt air corrosion: Proximity to coastal areas may expose equipment to salt-laden air
• Dust and debris accumulation: Tropical conditions can lead to faster buildup of organic matter and dust on panels

Preventative Measures

To maximize solar energy production despite these challenges, several protective measures should be implemented. Installing panels with robust mounting systems designed to withstand high winds is essential for typhoon resistance. Choose solar panels and inverters with high IP ratings for weather protection and corrosion-resistant materials, particularly aluminum frames with marine-grade coatings. Regular cleaning schedules become more critical in this environment to remove accumulated dust, pollen, and organic debris that can reduce panel efficiency. Installing panels at the recommended 10-degree tilt helps with natural rain washing, but manual cleaning may still be necessary during dry periods. Proper drainage around installations prevents water pooling, while elevated mounting helps improve air circulation for cooling. Using quality electrical components with appropriate weatherproofing ensures long-term reliability in the humid tropical environment. Despite these considerations, Leganes remains an outstanding location for solar energy generation, with its consistent high output levels making it well worth addressing these manageable environmental factors through proper installation and maintenance practices.

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 268 locations across Philippines. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Philippines by location

Solar output per kW of installed solar PV by season in Leganes

Seasonal solar PV output for Latitude: 10.7937, Longitude: 122.5881 (Leganes, Philippines), 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 10° South in Leganes, Philippines

To maximize your solar PV system's energy output in Leganes, Philippines (Lat/Long 10.7937, 122.5881) throughout the year, you should tilt your panels at an angle of 10° South 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 Leganes, Philippines

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 Leganes, Philippines. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 10° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
5° North in Summer	17° South in Autumn	26° South in Winter	5° South 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 Leganes, Philippines

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 Leganes, Philippines.

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 Leganes, Philippines

Topographical Features of Leganes

Leganes is situated in the province of Iloilo on Panay Island in the Western Visayas region of the Philippines. The municipality lies within the central plains of Iloilo, characterized by predominantly flat to gently rolling terrain that extends across much of the province's interior. This area forms part of the broader Central Panay Mountain Range foothills, where the landscape gradually transitions from the mountainous regions in the island's center to the coastal lowlands. The topography around Leganes consists primarily of agricultural plains with elevations ranging from near sea level to modest hills reaching approximately 100 to 200 meters above sea level. The terrain is interspersed with small watersheds and drainage systems that flow toward the Iloilo Strait to the south. Rice paddies and sugarcane fields dominate the landscape, taking advantage of the relatively flat terrain and fertile alluvial soils.

Regional Terrain Characteristics

Moving inland from Leganes toward the northeast, the topography begins to show more pronounced elevation changes as it approaches the Central Panay Mountain Range. These mountains form the backbone of Panay Island, with peaks reaching over 2,000 meters in elevation. However, the immediate vicinity around Leganes remains relatively flat, making it part of the extensive central plains that have historically supported the region's agricultural economy. The coastal areas to the southwest of Leganes feature low-lying terrain that gradually slopes toward the Iloilo Strait and Guimaras Strait. This coastal plain extends for several kilometers inland and is characterized by minimal elevation variation, creating ideal conditions for both agriculture and potential large-scale development projects.

Optimal Areas for Large-Scale Solar Development

The flat to gently rolling terrain surrounding Leganes presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas would be the expansive agricultural plains extending north and east of the municipality, where large contiguous parcels of relatively level land are available. These areas offer minimal grading requirements and reduced installation costs due to the favorable topographical conditions. The coastal plains to the southwest also present promising locations for solar development, particularly in areas that are elevated enough to avoid flooding concerns but remain sufficiently flat for efficient panel installation. The consistent terrain in these regions would allow for optimal panel orientation and spacing, maximizing energy capture potential. Areas closer to the foothills of the Central Panay Mountain Range, while still feasible for solar development, would require more careful site selection to avoid steeper slopes and potential shading issues from elevated terrain. However, some of these slightly elevated locations could offer advantages in terms of drainage and reduced flood risk during the monsoon season. The proximity to existing agricultural infrastructure and road networks throughout the plains around Leganes would facilitate construction and maintenance access for large-scale solar installations. Additionally, the relatively stable geological conditions of the alluvial plains provide a solid foundation for mounting systems and long-term structural integrity of solar arrays.

Philippines solar PV Stats as a country

Philippines ranks 40th in the world for cumulative solar PV capacity, with 1,370 total MW's of solar PV installed. Each year Philippines is generating 13 Watts from solar PV per capita (Philippines ranks 71st in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Philippines?

Yes, there are several incentives for businesses wanting to install solar energy in the Philippines. These include:

1. The Feed-in Tariff (FiT) program, which provides a guaranteed rate of return on investments in renewable energy projects;

2. Tax credits and exemptions from certain taxes;

3. Net metering programs that allow businesses to sell excess electricity back to the grid;

4. Grants and loans from government agencies such as the Department of Energy and the Philippine Solar Power Alliance;

5. Technical assistance from organizations like USAID’s Clean Energy Program; and

6. Access to financing through banks, venture capital firms, or other sources of private capital.

Do you have more up to date information than this on incentives towards solar PV projects in Philippines? 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.