Interlachen, Florida is a reasonably good location for year-round solar energy generation, positioned in the Northern Sub Tropics at coordinates 29.6268, -81.8913. The area shows solid solar production potential throughout most of the year, though with notable seasonal variations that property owners should understand before investing in solar panels.
Seasonal Solar Performance
Spring emerges as the peak solar season in Interlachen, delivering an impressive 6.47 kWh per day for each kilowatt of installed solar capacity. This makes March through May the most productive months for solar energy generation in the area.
Summer follows as the second-best season with 5.62 kWh/day per kW, providing strong and consistent energy production during the hot Florida months. Autumn drops to 4.59 kWh/day per kW, still maintaining decent output as the year progresses toward winter.
Winter represents the challenging season for solar production, falling to 3.67 kWh/day per kW. While this is the lowest output period, it's still sufficient to generate meaningful electricity, unlike locations in northern climates where winter solar production can become minimal.
Optimal Panel Installation
For maximum year-round energy production at this Interlachen location, solar panels should be installed at a fixed tilt angle of 27 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's changing position throughout the year and weighting the angles based on actual solar irradiance data.
Local Factors That Could Impact Solar Production
Several environmental and weather factors in Interlachen could potentially reduce solar panel efficiency and require preventative measures during installation:
- Frequent thunderstorms and heavy rainfall: Florida's summer storm season can create extended periods of cloud cover and reduce solar output
- High humidity levels: Persistent moisture can lead to faster degradation of panel components and connections
- Hurricane and severe weather risk: The location faces potential damage from high winds and flying debris during storm seasons
- Tree coverage and vegetation: Florida's lush plant growth can create shading issues that significantly impact panel performance
- Salt air exposure: Being relatively close to coastal areas, salt corrosion may affect metal components over time
Preventative Installation Measures
To maximize solar energy production despite these challenges, several installation strategies should be considered. Using marine-grade mounting hardware and corrosion-resistant materials helps combat humidity and potential salt air exposure. Panels should be installed with adequate spacing for air circulation to reduce heat buildup and moisture retention.
Proper drainage design prevents water accumulation on or around panels during Florida's intense rainstorms. Installing panels with hurricane-rated mounting systems and following local wind load requirements protects against severe weather damage.
Careful site planning to avoid current and future shading from trees is crucial, as even partial shading can dramatically reduce system performance. Regular maintenance schedules for cleaning panels and trimming vegetation help maintain optimal energy production throughout the year.
Overall, while Interlachen faces some typical Florida environmental challenges for solar installations, proper planning and quality installation practices can help ensure strong solar energy production year-round at this location.
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 4253 locations across the United States. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in the United States by location
Solar output per kW of installed solar PV by season in Interlachen
Seasonal solar PV output for Latitude: 29.6268, Longitude: -81.8913 (Interlachen, United States), 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 27° South in Interlachen, United States
To maximize your solar PV system's energy output in Interlachen, United States (Lat/Long 29.6268, -81.8913) throughout the year, you should tilt your panels at an angle of 27° 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 Interlachen, United States
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 Interlachen, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 27° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 14° South in Summer | 35° South in Autumn | 45° South in Winter | 22° 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 Interlachen, United States
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 Interlachen, United States.
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 Interlachen, United States
Topography and Terrain Around Interlachen
Interlachen sits in the heart of north-central Florida's distinctive lake country, positioned within Putnam County approximately 60 miles southwest of Jacksonville. The surrounding landscape is characterized by gently rolling hills that are unusually pronounced for Florida, creating a topography that differs markedly from the state's typically flat coastal plains and southern regions. The area features numerous natural lakes scattered throughout the terrain, with Lake Grandin being one of the most prominent water bodies near the community. These lakes were formed through centuries of groundwater activity and contribute to the region's undulating landscape. The elevation changes are modest but noticeable, with the terrain rising and falling in gentle waves across the countryside. Dense forests of pine, oak, and mixed hardwoods cover much of the region, interspersed with cleared agricultural lands and residential developments. The soil composition varies from sandy loam in higher areas to more organic, darker soils in lower-lying sections near water bodies. Wetland areas and small creeks weave through the landscape, creating a patchwork of different land types.Optimal Areas for Large-Scale Solar Development
The most suitable locations for large-scale solar photovoltaic installations would be found on the higher, well-drained plateau areas that extend northwest and southeast of Interlachen. These elevated sections offer several advantages including naturally level or gently sloping terrain that requires minimal grading, good drainage characteristics that reduce maintenance concerns, and typically clear title lands that are easier to develop. Agricultural areas currently used for cattle grazing or crop production present excellent opportunities for solar development. These lands are already cleared of trees, have established road access, and often feature relatively flat topography. The pastoral lands extending toward Palatka to the northeast and toward Ocala to the southwest contain numerous parcels that would be well-suited for solar arrays. Areas to avoid would include the immediate vicinity of the numerous lakes and wetlands, where environmental regulations would complicate development and where the terrain tends to be more irregular. The heavily forested sections, while potentially suitable from a topographical standpoint, would require extensive clearing that could prove economically challenging and environmentally sensitive. The region's proximity to existing electrical infrastructure along major transportation corridors, particularly near US Highway 20 and State Road 26, makes these areas particularly attractive for utility-scale solar development. The combination of suitable terrain, existing infrastructure, and agricultural zoning creates favorable conditions for large solar installations throughout much of the surrounding countryside.United States solar PV Stats as a country
United States ranks 2nd in the world for cumulative solar PV capacity, with 95,209 total MW's of solar PV installed. This means that 3.40% of United States's total energy as a country comes from solar PV (that's 26th in the world). Each year United States is generating 289 Watts from solar PV per capita (United States ranks 15th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United States?
Yes, there are several incentives for businesses wanting to install solar energy in the United States. These include federal tax credits, state and local rebates, net metering policies, and renewable energy certificates (RECs). Additionally, many states have enacted legislation that requires utilities to purchase a certain amount of electricity from renewable sources such as solar.
Do you have more up to date information than this on incentives towards solar PV projects in United States? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 29th of July 2025
Last Updated: Thursday 7th of August 2025
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Compare this location to others worldwide for solar PV potential
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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.
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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.




