Twin Falls, Idaho, United States shows moderate potential for year-round solar energy generation, though with significant seasonal variations typical of its Northern Temperate Zone location.

Seasonal Solar Performance

The solar output data reveals a clear seasonal pattern at this location. Summer provides the strongest performance at 7.66 kWh per day per kW of installed solar capacity, making it the peak season for solar energy generation. Spring follows as the second-best season with 6.62 kWh per day per kW, offering nearly comparable output to summer months. Autumn shows a notable decline to 4.05 kWh per day per kW, while winter presents the most challenging period with only 2.15 kWh per day per kW. This dramatic winter reduction means solar output drops to roughly 28% of summer levels, which is typical for northern latitude locations.

Optimal Installation Setup

For maximum year-round energy production at Twin Falls, solar panels should be installed at a fixed tilt angle of 36 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 for the varying solar potential across all seasons.

Local Environmental Challenges

Several environmental and weather factors in Twin Falls can impact solar energy production:

• Snow accumulation during winter months can block panels and significantly reduce output
• Dust and agricultural particles from surrounding farmland can coat panels
• Occasional severe weather including hail storms
• Temperature extremes that can affect panel efficiency

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies prove effective:

• Install panels at steeper angles (like the recommended 36 degrees) to promote natural snow shedding
• Ensure easy access for regular cleaning to remove dust and debris
• Use high-quality mounting systems designed to withstand wind and hail
• Consider panels with better temperature coefficients to handle extreme heat and cold
• Plan for adequate spacing between panel rows to prevent shading from snow buildup

Regular maintenance becomes particularly important in this location, with cleaning schedules adjusted for both dust accumulation during dry periods and snow removal when safe to do so. The substantial seasonal variation means that battery storage or grid-tied systems become essential for consistent year-round energy supply.

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 Twin Falls

Seasonal solar PV output for Latitude: 42.5582, Longitude: -114.4659 (Twin Falls, 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 Twin Falls, United States

To maximize your solar PV system's energy output in Twin Falls, United States (Lat/Long 42.5582, -114.4659) 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 Twin Falls, 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 Twin Falls, 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
26° South in Summer	46° South in Autumn	57° South in Winter	35° 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 Twin Falls, 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 Twin Falls, United States.

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 Twin Falls, United States

Topographical Features of Twin Falls

Twin Falls sits in south-central Idaho at an elevation of approximately 3,700 feet above sea level, positioned on the Snake River Plain. The city derives its name from the spectacular Twin Falls waterfall on the Snake River, where the water plunges dramatically into the Snake River Canyon. This canyon system dominates the local landscape, carved deep into the basaltic rock formations that characterize the region. The Snake River Canyon creates a striking geographical feature that runs east to west through the area, with steep canyon walls rising several hundred feet above the river. North of the canyon, the terrain transitions into relatively flat agricultural land that extends toward the foothills of the Sawtooth Mountains in the distance. South of the canyon, the landscape opens into gently rolling plains that stretch toward the Nevada border. The surrounding topography consists primarily of high desert terrain with sagebrush-covered plateaus and scattered buttes. The region experiences a semi-arid climate with wide temperature variations between seasons. The flat to gently rolling nature of much of the surrounding landscape, combined with minimal tree coverage outside of riparian areas along the Snake River, creates extensive open spaces with excellent sky exposure.

Optimal Areas for Large-Scale Solar Development

The most promising locations for utility-scale solar photovoltaic installations lie on the elevated plateaus both north and south of the Snake River Canyon. These areas offer the ideal combination of flat terrain, minimal shading obstacles, and sufficient space for large solar arrays. The high desert environment provides excellent atmospheric clarity with minimal cloud cover throughout much of the year. Areas south of Twin Falls toward the Cassia County line present particularly attractive opportunities for solar development. This region features vast expanses of relatively flat terrain with gentle slopes that can accommodate large solar installations without significant grading requirements. The sparse vegetation and minimal competing land uses make these areas economically viable for solar projects. The agricultural areas north of the canyon, while flatter in some sections, may face competing land use pressures from farming operations. However, marginal agricultural lands or areas transitioning away from irrigation could present opportunities for solar development. The elevated position of these northern areas provides excellent solar exposure while remaining accessible to existing electrical infrastructure. Areas immediately adjacent to the canyon rim should be avoided due to the complex terrain and potential environmental sensitivities. Similarly, locations with significant sagebrush habitat or proximity to wildlife corridors may face regulatory challenges that could complicate solar development projects. The region's existing electrical transmission infrastructure, including major power lines that traverse the Snake River Plain, provides advantageous grid connection opportunities for large-scale solar installations. This existing infrastructure reduces the additional investment required to bring solar projects online and makes the area more attractive for utility-scale development.

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

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.