Fianarantsoa, Madagascar, located at latitude -21.4493 and longitude 47.0878, presents a reasonably favorable environment for solar energy production throughout the year. This tropical location experiences consistent sunlight, with seasons primarily characterized by wet and dry periods rather than significant temperature variations.

Seasonal Solar Performance

Solar panel efficiency in Fianarantsoa varies across the meteorological seasons. Summer yields the highest output at 7.22 kWh per day for each kilowatt of installed solar capacity. Spring follows with 6.40 kWh/day, while autumn and winter produce 5.04 kWh/day and 4.22 kWh/day, respectively. The most productive period for solar energy generation in Fianarantsoa spans from late spring through summer (approximately October to March). During these months, longer days and more direct sunlight contribute to increased energy output. However, it's worth noting that even during the less productive winter months, the region still receives a substantial amount of sunlight, allowing for consistent energy generation year-round.

Optimal Panel Positioning

For fixed solar panel installations in Fianarantsoa, the ideal tilt angle to maximize year-round energy production is 19 degrees facing North. This angle takes into account the location's latitude and the sun's position throughout the year, ensuring optimal exposure to sunlight across all seasons.

Environmental Considerations

While Fianarantsoa's tropical climate is generally conducive to solar energy production, there are some environmental factors to consider: 1. Rainfall: The region experiences a wet season, typically from November to April, which may temporarily reduce solar panel efficiency due to cloud cover and rain. 2. Dust and debris: During the dry season, dust accumulation on solar panels can decrease their effectiveness. To mitigate these challenges, consider implementing the following measures: 1. Regular cleaning: Establish a maintenance schedule to clean panels, especially during the dry season when dust accumulation is more likely. 2. Weather-resistant equipment: Use high-quality, weather-resistant solar panels and mounting systems designed to withstand tropical conditions. 3. Proper drainage: Ensure adequate drainage around the installation site to prevent water accumulation during heavy rains. By addressing these factors, solar installations in Fianarantsoa can maintain high efficiency and reliability, making the most of the region's abundant sunlight 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 6 locations across Madagascar. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Madagascar by location

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

Seasonal solar PV output for Latitude: -21.4493, Longitude: 47.0878 (Fianarantsoa, Madagascar), 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 19° North in Fianarantsoa, Madagascar

To maximize your solar PV system's energy output in Fianarantsoa, Madagascar (Lat/Long -21.4493, 47.0878) throughout the year, you should tilt your panels at an angle of 19° North 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 Fianarantsoa, Madagascar

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 Fianarantsoa, Madagascar. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 19° North 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	27° North in Autumn	37° North in Winter	15° North 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 Fianarantsoa, Madagascar

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 Fianarantsoa, Madagascar.

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 Fianarantsoa, Madagascar

The landscape surrounding Fianarantsoa, Madagascar, is characterized by a diverse and picturesque topography. This central highland region features a mix of rolling hills, steep slopes, and expansive plateaus. The city itself is perched on a hilltop, offering panoramic views of the surrounding countryside. To the east of Fianarantsoa, the terrain gradually descends towards the coast, with lush rainforests and valleys dotting the landscape. The western side of the region is marked by more rugged terrain, with higher elevations and some mountainous areas. Throughout the area, numerous rivers and streams carve their way through the land, creating fertile valleys and adding to the region's natural beauty. The topography around Fianarantsoa is heavily influenced by its location in the central highlands of Madagascar. This results in a cooler climate compared to the coastal areas, with temperatures that are generally more moderate year-round. The elevation changes in the region contribute to microclimates, affecting local weather patterns and vegetation.

Potential for Large-Scale Solar PV

When considering areas near Fianarantsoa for large-scale solar photovoltaic (PV) installations, several factors come into play. The most suitable locations would ideally combine favorable topography, ample sunlight exposure, and proximity to existing infrastructure. The plateaus and gently sloping areas to the west and southwest of Fianarantsoa present promising opportunities for solar PV development. These regions typically receive consistent sunlight throughout the year and offer relatively flat terrain, which is ideal for the installation of solar panels. The open landscapes in these areas would minimize shading issues and allow for efficient panel placement. Another potentially suitable area lies to the north of Fianarantsoa, where the terrain becomes less mountainous and more open. This region benefits from good solar exposure and could accommodate large-scale installations without significant topographical challenges. It's important to note that while the immediate vicinity of Fianarantsoa may have some limitations due to its hilly nature, expanding the search radius to about 50-100 kilometers from the city could reveal more optimal locations for solar PV projects. These areas would likely offer a balance between suitable terrain, solar resources, and access to transportation and power infrastructure. Any large-scale solar PV development would need to consider environmental impacts, land use regulations, and the need to preserve agricultural areas, which are vital to the region's economy. Careful site selection and environmental assessments would be crucial to ensure that solar projects are sustainable and beneficial to the local communities.

Citation Guide

Article Details for Citation

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.