Menlo, Iowa, located in the Northern Temperate Zone, presents a mixed picture for solar energy generation. This location experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems throughout the year.
Seasonal Solar Performance
Solar energy production in Menlo varies considerably across the seasons. Summer stands out as the most productive period, with an impressive 6.98 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second-best season, generating 5.33 kWh/day/kW. However, autumn and winter see a substantial drop in output, with 3.69 kWh/day/kW and 2.56 kWh/day/kW respectively.
These figures indicate that Menlo's solar potential is most favorable from late spring through early fall. During this period, longer days and higher sun angles contribute to increased energy production. Conversely, the shorter days and lower sun angles of late fall and winter significantly reduce solar output.
Optimal Panel Installation
To maximize year-round solar production in Menlo, fixed solar panels should be installed at a tilt angle of 36 degrees facing south. This angle optimizes the panels' exposure to sunlight throughout the year, balancing the seasonal variations in sun position and intensity.
Environmental and Weather Considerations
While Menlo's location is generally conducive to solar energy production, there are some environmental and weather factors that could potentially impact solar panel efficiency:
- Snow accumulation in winter can temporarily reduce panel output
- Occasional severe weather events, such as hailstorms, may pose a risk to panel integrity
To mitigate these factors, consider installing panels at a steeper angle to promote snow shedding, and choose high-quality, impact-resistant panels. Regular maintenance, including snow removal when necessary, can help ensure optimal performance year-round.
In conclusion, while Menlo, Iowa experiences significant seasonal variations in solar output, proper panel installation and maintenance can help maximize energy production throughout the year. The location's solar potential is particularly strong during the warmer months, making it a viable option for those looking to harness solar energy.
Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° 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 Menlo
Seasonal solar PV output for Latitude: 41.5192, Longitude: -94.4044 (Menlo, 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 36° South in Menlo, United States
To maximize your solar PV system's energy output in Menlo, United States (Lat/Long 41.5192, -94.4044) throughout the year, you should tilt your panels at an angle of 36° 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 Menlo, 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 Menlo, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 25° South in Summer | 46° South in Autumn | 56° South in Winter | 34° 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 Menlo, 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 Menlo, 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 Menlo, United States
The topography around Menlo, Iowa, United States (located at 41.5192° N, 94.4044° W) is characterized by gently rolling hills and expansive agricultural lands typical of the Midwest region. This area is part of the larger physiographic region known as the Central Lowlands, which features a landscape shaped by glacial activity during the last ice age. The terrain surrounding Menlo consists primarily of low-relief prairie with subtle elevation changes. The land is generally flat to slightly undulating, with occasional shallow valleys and low ridges. Small streams and creeks meander through the area, contributing to the subtle variations in the landscape. The soil in this region is typically rich and fertile, making it ideal for farming, which is the dominant land use in the vicinity.
Potential 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 gently rolling terrain and abundance of open farmland in the region surrounding Menlo provide favorable conditions for solar energy development. The most suitable areas for large-scale solar PV would likely be found on the slightly elevated portions of the landscape, away from low-lying areas that may be prone to flooding or excessive moisture. South-facing slopes, even if gentle, would be particularly advantageous as they receive more direct sunlight throughout the day. Agricultural lands that are less productive or fallow fields could be prime candidates for solar farm development. These areas often offer large, unobstructed spaces that are ideal for the installation of solar panels. Additionally, land that is relatively flat and free from significant tree cover would require minimal site preparation, making it more cost-effective for solar development. It's important to note that while the topography is generally favorable for solar PV in this region, other factors such as proximity to electrical infrastructure, local zoning regulations, and environmental considerations would also play crucial roles in determining the most suitable locations for large-scale solar installations near Menlo.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!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Thursday 17th of April 2025
Last Updated: Thursday 14th of August 2025
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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.




