The location in Silang, Calabarzon, Philippines (14.2228, 120.9802) offers favorable conditions for solar energy generation throughout the year. Situated in the tropics, this area experiences consistent sunlight and is characterized by wet and dry seasons rather than traditional four-season cycles.

Seasonal Solar Performance

Solar panel performance at this location shows remarkable consistency across seasons, with a notable peak during spring:

• Spring: 6.94 kWh/day
• Summer: 5.27 kWh/day
• Autumn: 5.19 kWh/day
• Winter: 5.07 kWh/day

The spring season stands out as the most productive period for solar energy generation, likely due to clearer skies and optimal sun angles. However, the relatively small variation between the other seasons indicates that solar panels can perform efficiently year-round at this location.

Optimal Panel Installation

For fixed panel installations in Silang, Calabarzon, the ideal tilt angle to maximize year-round solar production is 13 degrees facing South. This angle has been calculated considering the location's latitude, daily solar elevation angles, and weighted by NASA's solar irradiance data.

Environmental Considerations

While the location 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. To mitigate this risk, robust mounting systems and high-quality, weather-resistant panels should be used.

2. Heavy rainfall: During the wet season, frequent rain might reduce solar efficiency. Installing panels at the optimal angle can help with water runoff and maintain cleanliness.

3. High humidity: The tropical climate's humidity can potentially affect electrical components. Using corrosion-resistant materials and ensuring proper sealing of all electrical connections is crucial.

Despite these challenges, with proper installation techniques and regular maintenance, solar energy systems in Silang can be highly productive and resilient.

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 Silang

Seasonal solar PV output for Latitude: 14.2228, Longitude: 120.9802 (Silang, 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 13° South in Silang, Philippines

To maximize your solar PV system's energy output in Silang, Philippines (Lat/Long 14.2228, 120.9802) throughout the year, you should tilt your panels at an angle of 13° 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 Silang, 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 Silang, Philippines. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 13° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
2° North in Summer	20° South in Autumn	30° South in Winter	7° 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 Silang, 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 Silang, 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 Silang, Philippines

The topography around Silang, Philippines, is characterized by a diverse and undulating landscape. Located in the province of Cavite, Silang sits on the northern slopes of Mount Sungay, part of the Tagaytay Ridge. This area is known for its hilly terrain, with elevations ranging from about 200 to 600 meters above sea level. The town itself is situated on a plateau, surrounded by gentle slopes and rolling hills. The region features a mix of agricultural lands, forested areas, and residential zones. Many parts of Silang and its surroundings are covered in lush vegetation, thanks to the area's fertile volcanic soil and favorable climate. Small valleys and ravines cut through the landscape, created by numerous streams and rivers that flow down from the higher elevations.

Potential for Solar PV Development

When considering areas nearby that would be most suited to large-scale solar PV installations, several factors come into play. The ideal locations would be relatively flat or gently sloping areas with good sun exposure and minimal shading from nearby hills or vegetation. The lowland areas to the north and northeast of Silang, stretching towards the municipalities of Carmona and General Mariano Alvarez, might offer suitable terrain for solar farms. These areas tend to have more open spaces and less dramatic topography compared to the hillier regions closer to Tagaytay. Another potentially suitable area could be found in the southeastern direction, towards the municipality of Indang. This region has some flatter expanses that could accommodate large solar arrays while still benefiting from the generally sunny climate of Cavite province. It's important to note that while topography is a crucial factor, other considerations such as land availability, proximity to power infrastructure, and local zoning regulations would also play significant roles in determining the feasibility of large-scale solar PV projects in the region. Additionally, careful environmental impact assessments would be necessary to ensure that any solar development does not negatively affect the area's rich biodiversity and agricultural productivity.

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.