Amulung, Cagayan Valley, Philippines, situated in the tropics, presents a generally favorable location for solar energy generation throughout the year. This area experiences consistent sunlight and is characterized more by wet and dry seasons than traditional four-season cycles.

Seasonal Solar Performance

The solar energy output in Amulung varies across the meteorological seasons. Spring yields the highest production at 6.70 kWh per day for each kilowatt of installed solar capacity. Summer follows closely with 6.10 kWh/day, while autumn sees a moderate decrease to 4.91 kWh/day. Winter experiences the lowest output at 3.84 kWh/day, but still maintains a respectable level of production.

Optimal Installation Angle

For fixed panel installations in Amulung, Cagayan Valley, the ideal tilt angle to maximize year-round solar production is 15 degrees facing South. This angle has been calculated to optimize energy capture across all seasons, taking into account the location's specific latitude and the Earth's elliptical orbit.

Peak Generation Periods

The most productive times for solar energy generation in Amulung are during spring and summer. These seasons offer longer daylight hours and typically clearer skies, allowing for maximum solar irradiance. However, the relatively high output during autumn and even winter suggests that solar PV systems can provide significant energy throughout the year.

Environmental Considerations

While Amulung's tropical location is generally conducive to 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 wet season may lead to reduced sunlight and increased cloud cover. To mitigate these risks, robust mounting systems designed to withstand high winds should be employed. Additionally, regular cleaning and maintenance of panels, especially during the rainy season, can help maintain optimal performance. Installing a slightly steeper tilt angle than the calculated 15 degrees may also assist with self-cleaning during heavy rains. Despite these challenges, Amulung's location remains highly suitable for solar PV installations, with the potential for substantial year-round energy production when proper precautions are taken.

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 Amulung

Seasonal solar PV output for Latitude: 17.8386, Longitude: 121.7249 (Amulung, 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 15° South in Amulung, Philippines

To maximize your solar PV system's energy output in Amulung, Philippines (Lat/Long 17.8386, 121.7249) throughout the year, you should tilt your panels at an angle of 15° 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 Amulung, 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 Amulung, Philippines. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 15° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
2° South in Summer	23° South in Autumn	33° South in Winter	11° 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 Amulung, 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 Amulung, 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 Amulung, Philippines

The topography around Amulung, Philippines, is characterized by a mix of lowland plains and gently rolling hills. Located in the northeastern part of Luzon island, Amulung sits in the Cagayan Valley region, which is known for its vast agricultural lands and river systems. The area surrounding Amulung is primarily flat to slightly undulating terrain, with the Cagayan River flowing nearby. This river, the longest in the Philippines, has shaped the landscape over time, creating fertile alluvial plains that are ideal for agriculture. As you move away from the river, the land gradually rises into low hills and occasional elevated areas. To the east of Amulung, the Sierra Madre mountain range can be seen in the distance. This mountain range runs along the eastern coast of Luzon and influences the local climate and topography. However, the immediate vicinity of Amulung remains relatively flat, with only minor changes in elevation.

Potential for Large-Scale Solar PV

When considering areas nearby that would be most suited for large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would have the following characteristics: Firstly, the flat or gently sloping agricultural lands surrounding Amulung offer promising potential for solar PV development. These areas receive ample sunlight throughout the year and have minimal shading from natural features or structures. The open fields provide large, uninterrupted spaces that could accommodate extensive solar panel arrays. Secondly, the slightly elevated areas on the outskirts of the town might be suitable for solar installations. These locations could benefit from better exposure to sunlight and reduced risk of flooding, which is an important consideration given the proximity to the Cagayan River. It's worth noting that while the agricultural lands present opportunities for solar development, careful consideration must be given to balancing energy production with food security. Ideally, solar projects would be implemented on less productive agricultural land or through innovative approaches like agrivoltaics, which combine solar energy production with crop cultivation. Areas to the east of Amulung, where the terrain begins to rise towards the Sierra Madre mountains, might also offer good sites for solar PV. These locations could potentially have higher elevations and clearer skies, maximizing solar exposure. However, accessibility and grid connection would need to be carefully evaluated in these more remote areas. In conclusion, the relatively flat topography and abundance of open spaces around Amulung provide numerous options for large-scale solar PV development. The most suitable areas would likely be the gently sloping agricultural lands and slightly elevated regions that offer a combination of good solar exposure, minimal flooding risk, and reasonable accessibility for construction and maintenance.

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.