Big Timber, Montana, located in the Northern Temperate Zone at coordinates 45.8244, -109.9619, presents a mixed picture for year-round solar energy generation via photovoltaic (PV) systems. The location experiences significant seasonal variations in solar output, which impacts its overall suitability for solar power production.
Seasonal Solar Performance
Summer stands out as the most productive season for solar energy in Big Timber, with an impressive daily output of 7.10 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.38 kWh/day. However, the performance drops considerably during autumn and winter, with outputs of 3.41 kWh/day and 2.04 kWh/day, respectively.
These figures indicate that Big Timber's solar potential is heavily skewed towards the warmer months, with summer and spring being ideal times for energy generation. The substantial decrease in output during autumn and winter suggests that alternative or supplementary energy sources may be necessary during these periods to maintain consistent power supply.
Optimal Panel Installation
For those considering a fixed panel installation in Big Timber, the ideal angle to maximize year-round solar production is 39 degrees, tilted towards the South. This angle has been calculated to optimize energy capture across all seasons, taking into account the location's latitude and the Earth's elliptical orbit.
Environmental and Weather Considerations
Several factors could potentially impede solar production in Big Timber:
- Snow accumulation: Montana's winters can bring significant snowfall, which may cover solar panels and reduce their efficiency.
- Cloud cover: The region experiences cloudy days, particularly during winter months, which can decrease solar output.
- Dust and pollen: Agricultural activities and natural vegetation in the area may lead to dust and pollen accumulation on panels.
To mitigate these issues, consider the following preventative measures:
- Install panels at a steeper angle to promote snow sliding off
- Use snow-shedding coatings on panels
- Implement a regular cleaning schedule to remove dust and pollen
- Consider a tracking system to maximize sun exposure throughout the day
While Big Timber faces challenges for year-round solar production, proper planning and maintenance can help maximize energy generation, particularly during the highly productive summer and spring seasons.
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 Big Timber
Seasonal solar PV output for Latitude: 45.8244, Longitude: -109.9619 (Big Timber, 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 39° South in Big Timber, United States
To maximize your solar PV system's energy output in Big Timber, United States (Lat/Long 45.8244, -109.9619) throughout the year, you should tilt your panels at an angle of 39° 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 Big Timber, 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 Big Timber, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 39° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 29° South in Summer | 49° South in Autumn | 59° South in Winter | 38° 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 Big Timber, 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 Big Timber, 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 Big Timber, United States
The topography around Big Timber, Montana, in the United States, is characterized by a diverse and picturesque landscape that reflects the transition between the Great Plains and the Rocky Mountains. Located in south-central Montana, Big Timber sits in a valley along the Yellowstone River, surrounded by rolling hills and distant mountain ranges. To the north and east of Big Timber, the terrain is primarily composed of gently rolling prairies and grasslands, typical of the Great Plains region. These open expanses feature subtle undulations and occasional buttes or small hills, creating a vast and expansive feel to the landscape. As one moves south and west from Big Timber, the topography becomes more dramatic and varied. The Crazy Mountains, a striking isolated mountain range, rise prominently to the northwest, their jagged peaks creating a stunning backdrop. To the south, the Absaroka Range looms in the distance, marking the northern edge of the Greater Yellowstone Ecosystem.
Potential for Large-Scale Solar PV
When considering areas near Big Timber for large-scale solar photovoltaic (PV) installations, several factors come into play. The most suitable locations would likely be found in the flatter, open areas to the north and east of the town. These regions offer several advantages for solar energy development: Firstly, the relatively flat terrain of the prairies and grasslands provides ample space for large arrays of solar panels without the need for extensive land modification. The open nature of these areas also means there are fewer obstacles that could cast shadows on the panels, maximizing their exposure to sunlight throughout the day. Secondly, these areas typically receive a good amount of sunlight due to their elevation and lack of significant geographical features that might obstruct solar radiation. The climate in this region is characterized by cold winters but generally sunny conditions year-round, which is favorable for solar energy production. However, it's important to note that while these areas may be topographically suitable, other factors such as proximity to existing power infrastructure, environmental considerations, and local zoning regulations would also play crucial roles in determining the feasibility of large-scale solar PV projects. Additionally, the presence of agricultural activities in these areas might necessitate careful planning to balance solar development with existing land uses.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: Friday 24th of January 2025
Last Updated: Monday 21st of July 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.




