Post Falls, Idaho, situated in the Northern Temperate Zone, presents a mixed landscape for solar energy generation throughout the year. The location's seasonal variations in solar output highlight both opportunities and challenges for photovoltaic (PV) systems.

Seasonal Solar Performance

Summer stands out as the most productive season, with an impressive 7.32 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second-best season, generating 5.69 kWh/day. These warmer months offer ideal conditions for solar energy production, with longer daylight hours and more direct sunlight.

However, the colder months see a significant drop in solar output. Autumn yields 2.94 kWh/day, while winter experiences the lowest production at just 1.21 kWh/day per kilowatt installed. This stark contrast underscores the seasonal challenges faced by solar installations in Post Falls.

Optimizing Solar Panel Installation

To maximize year-round solar energy production, fixed panels should be tilted at a 39-degree angle facing south. This optimal angle helps capture the most sunlight throughout the year, balancing the varying sun positions across seasons.

Environmental and Weather Considerations

Post Falls faces some environmental factors that could impact solar production:

• Snow accumulation in winter can temporarily reduce panel efficiency
• Wildfire smoke in summer months may occasionally diminish solar irradiance

To mitigate these issues, consider installing panels at a steeper angle to encourage snow sliding off and using automated cleaning systems to remove ash or dust. Additionally, choosing high-efficiency panels can help maximize production during periods of reduced sunlight.

While Post Falls isn't ideal for year-round solar production due to its significant seasonal variations, the strong performance in spring and summer makes it a viable location for solar energy. With proper planning and mitigation strategies, a solar PV system can still provide substantial benefits to homeowners and businesses in the area.

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 Post Falls

Seasonal solar PV output for Latitude: 47.7282, Longitude: -116.9389 (Post 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 39° South in Post Falls, United States

To maximize your solar PV system's energy output in Post Falls, United States (Lat/Long 47.7282, -116.9389) 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 Post 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 Post Falls, 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
31° South in Summer	50° South in Autumn	62° South in Winter	40° 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 Post 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 Post 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 Post Falls, United States

The area around Post Falls, Idaho in the United States features a diverse and picturesque topography characteristic of the Inland Northwest region. Situated in the northern panhandle of Idaho, Post Falls is nestled in the Spokane Valley, with the Spokane River running through the heart of the city. The landscape surrounding Post Falls is dominated by rolling hills and prairies, interspersed with forested areas. To the north and east, the terrain gradually rises towards the Selkirk Mountains, while to the south, the Coeur d'Alene Mountains loom in the distance. The nearby Rathdrum Prairie, a flat expanse stretching to the north and west, provides a stark contrast to the more rugged terrain in other directions.

Topographical Features

The Spokane River, which flows westward from Lake Coeur d'Alene, cuts through the landscape, creating a scenic river valley. This waterway has played a crucial role in shaping the local topography, carving out rocky gorges and creating falls that give the city its name. The area also boasts numerous lakes, with Lake Coeur d'Alene being the largest and most prominent. These bodies of water, formed by glacial activity during the last ice age, add to the region's geographical diversity and natural beauty.

Potential for Solar PV

When considering areas nearby that would be most suited to large-scale solar PV installations, the Rathdrum Prairie stands out as a prime candidate. This expansive, relatively flat area receives ample sunlight and has fewer obstructions compared to the more mountainous regions surrounding Post Falls. The prairie's open landscape provides ideal conditions for solar panel placement, with minimal shading from natural features. Additionally, its proximity to existing infrastructure and power grids makes it an attractive option for solar energy development. However, it's important to note that while the Rathdrum Prairie offers favorable conditions for solar PV, any large-scale installation would need to balance energy production goals with agricultural and conservation concerns, as the prairie is also valuable farmland and an important ecosystem. Areas to the south and southeast of Post Falls, where the terrain begins to rise, might also offer good potential for solar PV installations. These slightly elevated locations could benefit from increased sun exposure, particularly during winter months when the sun's angle is lower. In conclusion, while the varied topography around Post Falls presents some challenges for large-scale solar PV development, the region does offer promising locations, particularly in flatter, open areas like the Rathdrum Prairie. Careful site selection and planning would be crucial to maximize solar energy potential while preserving the area's natural beauty and ecological balance.

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.