Koror, Palau, located in the tropical Pacific, offers an excellent location for solar energy generation throughout the year. This region experiences consistent sunlight and is characterized more by wet and dry seasons than traditional four-season climates.

Year-round Solar Potential

The solar energy output at this location is remarkably stable across all seasons. Spring sees the highest production at 5.79 kWh per day for each kilowatt of installed solar capacity. Summer and autumn follow closely behind with 5.66 kWh/day and 5.62 kWh/day, respectively. Even during winter, the output remains strong at 5.04 kWh/day. This consistency in solar production throughout the year makes Koror an ideal location for solar PV installations. The minimal variation between seasons ensures a reliable energy supply, reducing the need for extensive energy storage solutions or backup power systems.

Optimal Panel Tilt

For fixed solar panel installations in Koror, the ideal tilt angle to maximize year-round production is 7 degrees facing South. This relatively shallow angle reflects the location's proximity to the equator, where the sun's path is more directly overhead throughout the year.

Environmental Considerations

While Koror's tropical climate is generally favorable for solar energy production, there are some environmental factors to consider: 1. High humidity and rainfall: The region's wet seasons can lead to increased cloud cover and rainfall, potentially reducing solar output. 2. Tropical storms: Although less frequent than in some other tropical areas, occasional storms could pose a risk to solar installations. To mitigate these factors, consider the following preventative measures: • Use corrosion-resistant materials and proper sealing to protect against moisture damage. • Install robust mounting systems capable of withstanding strong winds. • Implement regular cleaning and maintenance schedules to combat the effects of high humidity and potential algae growth on panels. Despite these considerations, the consistent year-round solar potential in Koror makes it an excellent location for solar PV installations. With proper planning and maintenance, solar energy systems in this area can provide a reliable and sustainable source of electricity throughout the year.

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

Link: Solar PV potential in Palau by location

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

Seasonal solar PV output for Latitude: 7.3361, Longitude: 134.4711 (Koror, Palau), 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 7° South in Koror, Palau

To maximize your solar PV system's energy output in Koror, Palau (Lat/Long 7.3361, 134.4711) throughout the year, you should tilt your panels at an angle of 7° 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 Koror, Palau

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 Koror, Palau. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 7° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
8° North in Summer	13° South in Autumn	23° South in Winter	1° 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 Koror, Palau

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 Koror, Palau.

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 Koror, Palau

Koror, the most populous state in Palau, is situated on a group of islands in the western Pacific Ocean. The topography around Koror is characterized by a mix of low-lying coral islands, limestone rock formations, and lush tropical vegetation. The main island of Koror is relatively flat, with gentle hills and a maximum elevation of about 200 feet above sea level. The coastline is irregular, featuring numerous bays, lagoons, and mangrove swamps. Surrounding Koror are several smaller islands, including Malakal, Arakabesan, and Ngerekebesang, which are connected by causeways and bridges. These islands share similar topographical features, with a combination of flat coastal areas and modest interior elevations. The landscape is dotted with dense tropical forests, sandy beaches, and coral reefs that extend into the surrounding waters.

Potential Areas for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would have ample flat or gently sloping land, minimal shading from vegetation or geographical features, and good access to existing infrastructure. One potential area for solar PV development could be the more open, less forested sections of Babeldaob Island, which lies to the north of Koror. Babeldaob is the largest island in Palau and has more available land area compared to the densely populated Koror state. Some of the cleared areas or grasslands on Babeldaob's western coast might be suitable for solar installations. Another possibility could be utilizing some of the flatter coastal areas on Koror itself or on nearby islands, provided they are not prone to flooding or erosion. However, careful consideration would need to be given to potential environmental impacts and land use conflicts, as much of Palau's economy relies on tourism and the preservation of its natural beauty. It's important to note that while Palau receives abundant sunshine, the limited land area and the need to protect the islands' unique ecosystems pose significant challenges for large-scale solar development. As such, a more distributed approach with smaller installations on existing buildings or in already developed areas might be more practical and environmentally sound for Palau's energy needs.

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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.