Solar PV Analysis of Silay, Philippines
Silay, Western Visayas, Philippines is a good location for solar energy generation throughout the year due to its tropical climate which provides consistent sunlight. The amount of energy that can be generated from solar panels does vary slightly with the seasons. In summer and spring, more energy can be produced - up to 6.45kWh per day for each kW of installed solar in spring and 5.62kWh/day in summer. During autumn and winter, this falls slightly to 5.16kWh/day and 4.93kWh/day respectively.
However, these are still solid numbers for power production throughout the year making it an ideal location for solar power generation all year round.
The best angle to install solar panels here is tilted at around 10 degrees towards the south as this maximises overall yearly production from the sun's path across this part of the globe.
As with any location though, there may be local factors that could affect how much energy you can generate from your solar panels in Silay.
Potential challenges might include weather patterns like heavy rainfall or typhoons during certain times of year which could temporarily reduce sunlight exposure or potentially damage equipment if not properly secured.
The area's topography might also pose some challenges - if there are hills or other structures casting shadows on your installation site during peak sunshine hours, they could reduce your potential power output.
To overcome these challenges:
1) Choose a site carefully where shadows won't fall on your panels during peak sun hours.
2) Securely anchor your equipment so it can withstand high wind speeds associated with typhoons.
3) Regular cleaning/maintenance will help ensure optimal performance even after heavy rainfall or dust accumulation.
4) Consider using sturdy materials and designs that can withstand extreme weather conditions when installing your system.
In conclusion, while there are some potential issues to consider when installing a PV system in Silay, Western Visayas, Philippines; proper planning and maintenance should allow you to generate a substantial amount of solar energy year-round.
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 Silay
Seasonal solar PV output for Latitude: 10.7953, Longitude: 122.978 (Silay, 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 Silay, Philippines
To maximize your solar PV system's energy output in Silay, Philippines (Lat/Long 10.7953, 122.978) 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 Silay, 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 Silay, 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 Silay, 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 Silay, 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 Silay, Philippines
Silay, Philippines is located in the province of Negros Occidental and is characterized by a mix of flatlands, rolling hills, and mountainous areas. The city itself lies on relatively flat terrain which gradually slopes towards the sea. The northern part of Silay consists mostly of plains while the southern part is hilly and mountainous, featuring Mount Silay and Mount Mandalagan.
For large-scale solar PV installations, locations with high levels of solar radiation and large areas of flat or gently sloping land are ideal. Considering this, the northern plains around Silay could be suitable for such a project due to their relatively flat topography. Additionally, these areas are likely to have fewer obstructions (like trees or tall buildings) that could block sunlight.
However, it's important to note that many factors need to be considered when choosing a site for large-scale solar PV installations. These include not only topography but also local climate conditions (including average sunlight hours), proximity to power grids or demand centers (to minimize transmission losses), land use restrictions and environmental considerations.
Therefore detailed feasibility studies involving site visits as well as technical and economic analyses would be necessary before any specific sites can be definitively identified as being suitable for large-scale solar PV installation in or around Silay.
Finally remember that while Negros Occidental has been known for its sugarcane plantations which take up vast tracts of land; there has been an increasing shift towards renewable energy projects including solar farms in recent years due its abundant sunshine throughout the year.
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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Sunday 4th of February 2024
Last Updated: Monday 21st of July 2025
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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.
