Grand Junction, Colorado, situated in the Northern Temperate Zone, offers a relatively favorable location for solar PV energy generation throughout the year. The city's geographical position at latitude 39.0761 and longitude -108.5451 provides ample opportunities for harnessing solar energy, albeit with seasonal variations.

Seasonal Solar Output

Solar energy production in Grand Junction fluctuates significantly across seasons. Summer stands out as the most productive period, with an impressive daily output of 7.79 kWh per kW of installed solar capacity. Spring follows closely, generating 6.71 kWh/day. Autumn sees a moderate decline to 4.48 kWh/day, while winter experiences the lowest output at 2.99 kWh/day.

The substantial difference between summer and winter production highlights the impact of seasonal changes on solar energy generation in this region. However, the relatively high output during spring and autumn contributes to a respectable year-round average.

Optimal Panel Positioning

To maximize solar energy production throughout the year, fixed solar panels in Grand Junction should be tilted at a 34-degree angle facing south. This optimal angle takes into account the city's latitude and seasonal sun paths, ensuring efficient energy capture across all seasons.

Environmental Considerations

While Grand Junction's climate is generally conducive to solar energy production, there are some environmental factors to consider. The area experiences occasional dust storms and high winds, which can temporarily reduce panel efficiency. To mitigate these issues, regular cleaning and maintenance of solar panels is essential.

Additionally, Grand Junction's semi-arid climate means hot summers and cold winters. High temperatures can slightly decrease solar panel efficiency, while snow accumulation in winter may temporarily obstruct panels. Installing panels at the recommended angle helps with snow shedding, and using high-quality, temperature-resistant panels can maintain efficiency during hot periods.

Conclusion

Overall, Grand Junction presents a favorable location for solar PV energy generation. With proper installation techniques and regular maintenance, the city's abundant sunshine can be effectively harnessed for sustainable energy production throughout the year.

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 Grand Junction

Seasonal solar PV output for Latitude: 39.0761, Longitude: -108.5451 (Grand Junction, 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 34° South in Grand Junction, United States

To maximize your solar PV system's energy output in Grand Junction, United States (Lat/Long 39.0761, -108.5451) throughout the year, you should tilt your panels at an angle of 34° 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 Grand Junction, 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 Grand Junction, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
23° South in Summer	43° South in Autumn	53° South in Winter	32° 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 Grand Junction, 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 Grand Junction, 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 Grand Junction, United States

The topography around Grand Junction, Colorado, is characterized by a diverse and dramatic landscape. The city itself sits in a broad valley where the Colorado and Gunnison rivers meet, surrounded by mesas, canyons, and mountains. To the east and north, the imposing Colorado National Monument rises with its towering red rock formations and deep canyons. The Book Cliffs, a series of desert mountains and cliffs, stretch to the north and northwest. To the south, the Grand Mesa, one of the world's largest flat-top mountains, dominates the horizon with its forested slopes. The immediate area around Grand Junction is relatively flat, with the city situated on an alluvial plain. This valley, known as the Grand Valley, is bordered by steep cliffs and mesas on multiple sides. The terrain gradually rises as you move away from the city center, transitioning into more rugged and varied topography.

Potential Areas for Large-Scale Solar PV

When considering areas near Grand Junction for large-scale solar photovoltaic (PV) installations, several factors come into play. The most suitable locations would be those with ample flat or gently sloping land, minimal shading from surrounding terrain, and good access to existing infrastructure. The areas to the west and southwest of Grand Junction, extending towards the Utah border, offer promising potential for solar PV development. This region features expansive desert landscapes with relatively flat terrain and high sun exposure. The climate here is arid, with few cloudy days, making it ideal for solar energy generation. Another area of interest lies to the north of Grand Junction, in the vicinity of Mack and Loma. This area offers large tracts of open land with minimal vegetation and gentle slopes. The proximity to existing transportation routes and power infrastructure adds to its suitability for solar projects. The desert regions south of Grand Junction, particularly around Delta and Montrose counties, also present opportunities for large-scale solar installations. These areas benefit from high solar irradiance and vast open spaces that could accommodate extensive arrays of solar panels. It's important to note that while these areas may be topographically suitable, any large-scale solar development would need to consider other factors such as environmental impact, land ownership, and proximity to power transmission infrastructure. Additionally, careful planning would be required to ensure that solar installations do not interfere with the region's natural beauty and recreational value, which are vital to the local economy and quality of life.

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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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.