Colville, Washington, located in the Northern Temperate Zone, presents a mixed picture for year-round solar energy generation. The seasonal variation in solar output is quite dramatic at this location, making it less than ideal for consistent solar power production throughout the year.

Seasonal Solar Performance

Summer provides excellent solar generation at 7.20 kWh per day per kW of installed capacity, making it the peak season for solar energy production. Spring also offers good performance at 5.41 kWh per day per kW, representing the second-best time for solar generation at this location. However, the colder months present significant challenges. Autumn drops considerably to 2.70 kWh per day per kW, while winter plummets to just 1.29 kWh per day per kW. This means winter solar output is less than one-sixth of summer production, creating a substantial seasonal energy gap.

Optimal Panel Configuration

For fixed panel installations at this Colville location, the ideal tilt angle is 40 degrees facing south to maximize total year-round solar production. This angle is calculated based on the latitude and accounts for seasonal sun angle variations throughout the year.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Colville area can significantly impact solar energy production:

• Snow accumulation during winter months can completely block solar panels
• Frequent cloud cover and overcast conditions, particularly common in the Pacific Northwest
• Forest fire smoke during summer and fall seasons
• Heavy rainfall and persistent fog
• Ice formation on panels during freezing conditions

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies can help: Installing panels at the optimal 40-degree tilt angle not only improves year-round efficiency but also helps snow slide off more easily during winter months. Consider installing heating elements or snow guards to prevent dangerous ice slides while ensuring panels remain clear. Proper spacing between panel rows prevents shading and allows better air circulation for cooling. Regular maintenance schedules should include cleaning panels after dust storms or fire seasons, and removing snow buildup when safe to do so. Investing in high-quality panels with anti-reflective coatings can help capture more light during cloudy conditions. Additionally, installing a monitoring system helps identify when panels need cleaning or maintenance due to reduced output from environmental factors.

Overall Assessment

While Colville's summer solar potential is quite good, the dramatic seasonal variation and challenging winter conditions make this location less ideal for year-round solar energy generation compared to sunnier, more consistent climates. The location works best for applications that can either store excess summer energy or supplement with alternative energy sources during the low-production winter months.

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 Colville

Seasonal solar PV output for Latitude: 48.5466, Longitude: -117.9055 (Colville, 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 40° South in Colville, United States

To maximize your solar PV system's energy output in Colville, United States (Lat/Long 48.5466, -117.9055) throughout the year, you should tilt your panels at an angle of 40° 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 Colville, 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 Colville, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 40° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
32° South in Summer	51° South in Autumn	62° South in Winter	41° 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 Colville, 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 Colville, 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 Colville, United States

Topographical Features Around Colville

Colville sits in the northeastern corner of Washington State, nestled within a landscape characterized by rolling hills, forested ridges, and river valleys. The town lies in the Colville River Valley at an elevation of approximately 1,600 feet above sea level, surrounded by the foothills of the Selkirk Mountains to the north and east. The terrain features a mix of gentle slopes and steeper hillsides, with elevations in the immediate area ranging from about 1,400 feet in the valley bottoms to over 3,000 feet on the surrounding ridgetops.

The region displays typical inland Pacific Northwest topography, with dense coniferous forests covering much of the higher elevations and more open agricultural land occupying the valley floors and gentler slopes. The Colville River meanders through the valley, creating relatively flat bottomland that contrasts with the more undulating terrain of the surrounding hills. Small creeks and seasonal drainages cut through the landscape, creating a network of minor valleys and ridges that add complexity to the local topography.

North of Colville, the land gradually rises toward the Canadian border, with increasingly mountainous terrain dominated by the Selkirk Range. To the south and west, the topography becomes somewhat more moderate, featuring rolling hills interspersed with agricultural valleys and cleared areas where logging activities have created openings in the forest canopy.

Optimal Areas for Large-Scale Solar Development

The most promising locations for large-scale solar photovoltaic installations around Colville would be the gently sloping hillsides and cleared agricultural areas south and southwest of the town. These areas offer several advantages including relatively consistent southern exposure, moderate slopes that facilitate construction and maintenance access, and existing cleared land that would minimize environmental impact and development costs.

The agricultural valleys extending south toward the Spokane River corridor present particularly attractive opportunities for solar development. These areas feature expansive cleared fields with gentle topography, good road access for construction equipment, and proximity to existing electrical infrastructure. The rolling hills in this region provide natural windbreaks while maintaining optimal solar orientation on south-facing slopes.

Areas to the west of Colville, where the terrain transitions from forested hills to more open rangeland, also show promise for solar installations. The moderate elevations and cleared grazing areas would require minimal site preparation, while the open landscape reduces shading concerns from surrounding vegetation or terrain features. These western locations benefit from slightly less severe winter weather patterns compared to the more mountainous areas to the north and east.

The flatter bottomlands along the Colville River itself could accommodate solar installations, though these areas may face occasional challenges from seasonal flooding or higher humidity levels. However, the easy access and level terrain make these locations worth considering for smaller-scale developments or as part of larger distributed solar projects that span multiple terrain types.

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.