Balamban, Central Visayas, Philippines, situated at latitude 10.5004 and longitude 123.7127, offers a promising location for solar energy generation throughout the year. This tropical setting experiences consistent sunlight, with seasons primarily characterized by wet and dry periods rather than traditional temperature-based seasons.
Solar Energy Potential
The solar energy potential in Balamban is relatively high and stable across all seasons. Spring stands out as the most productive period, with an impressive 6.13 kWh per day for each kilowatt of installed solar capacity. Summer follows closely with 5.65 kWh/day, while autumn and winter show slightly lower but still significant outputs of 5.02 kWh/day and 4.38 kWh/day, respectively. These figures indicate that Balamban is well-suited for year-round solar energy production, with only minor fluctuations between seasons. The consistent sunlight typical of tropical regions contributes to this stability, making it an ideal location for solar PV installations.Optimal Panel Tilt
For fixed solar panel installations in Balamban, Central Visayas, the ideal tilt angle to maximize year-round energy production is 9 degrees facing South. This relatively shallow angle is due to the location's proximity to the equator, where the sun's path is more directly overhead throughout the year.Environmental Considerations
While Balamban's tropical climate is generally favorable for solar energy production, there are some environmental factors to consider: 1. Typhoons: The Philippines is prone to tropical cyclones, which can potentially damage solar installations. 2. Heavy rainfall: The region experiences a wet season, which may temporarily reduce solar output. To mitigate these risks, solar installations in Balamban should incorporate: - Sturdy mounting systems designed to withstand high winds - Waterproof and corrosion-resistant components - Regular maintenance to ensure optimal performance By addressing these factors, solar energy systems in Balamban can maintain high levels of productivity throughout the year, taking full advantage of the location's abundant sunlight and consistent energy potential.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 Balamban
Seasonal solar PV output for Latitude: 10.5004, Longitude: 123.7127 (Balamban, 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 9° South in Balamban, Philippines
To maximize your solar PV system's energy output in Balamban, Philippines (Lat/Long 10.5004, 123.7127) throughout the year, you should tilt your panels at an angle of 9° 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 Balamban, 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 Balamban, Philippines. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 9° 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 | 4° 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 Balamban, 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 Balamban, Philippines.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Balamban, Philippines
The topography around Balamban, Philippines, is characterized by a diverse landscape that includes both coastal areas and mountainous terrain. Situated on the western coast of Cebu Island, Balamban features a mix of flat lowlands near the shoreline and increasingly hilly regions as one moves inland. The coastal areas are relatively narrow, quickly giving way to rolling hills and steeper slopes. As you travel eastward from the coast, the elevation gradually increases, with the terrain becoming more rugged and mountainous. The Central Cebu Protected Landscape, a significant mountain range, dominates the eastern portion of the municipality. This mountainous region is marked by steep slopes, deep valleys, and dense forest cover. The highest peaks in this area reach elevations of over 1,000 meters above sea level. Rivers and streams originating from the mountains flow westward, carving valleys and creating a network of waterways that eventually empty into the Tañon Strait. These water features have shaped the landscape over time, creating areas of fertile alluvial soil in the lower regions.
Suitable Areas for Large-Scale Solar PV
When considering locations for large-scale solar photovoltaic (PV) installations near Balamban, several factors come into play. The most suitable areas would typically be: Coastal plains and lowlands: The relatively flat areas near the coast offer the advantage of ample sunlight exposure and easier access for construction and maintenance. These locations would likely have fewer shading issues from surrounding terrain. Gently sloping hillsides: Areas with a slight inclination facing south or west could be ideal for solar PV installations. These slopes can provide good sun exposure throughout the day while minimizing the need for extensive land grading. Cleared upland areas: Some of the higher elevation regions, where vegetation has been cleared for agriculture or other purposes, could be repurposed for solar farms. These areas often receive excellent sun exposure due to their elevation and lack of obstruction. It's important to note that while the mountainous regions receive ample sunlight, the steep terrain and dense forest cover make them less suitable for large-scale solar installations. The costs and environmental impact of clearing such areas would likely outweigh the benefits. Any large-scale solar PV project would need to carefully balance energy production potential with environmental considerations, land use regulations, and the needs of local communities. Detailed site surveys and environmental impact assessments would be necessary to determine the most appropriate locations for such developments in the Balamban area.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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Wednesday 19th of March 2025
Last Updated: Monday 21st of July 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

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.




