The city of Wenatchee, Washington, located in the Northern Temperate Zone, presents a mixed scenario for year-round solar energy generation via photovoltaic (PV) panels. With coordinates 47.4221°N, 120.3266°W, this location experiences significant seasonal variations in solar energy production.

Seasonal Solar Production

Summer stands out as the most productive season, with an impressive 7.34 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second-best season, generating 5.59 kWh/day. However, autumn sees a substantial drop to 2.83 kWh/day, while winter experiences the lowest output at a mere 1.40 kWh/day. These figures highlight the stark contrast between the warm and cold seasons in Wenatchee. The long, sunny days of summer provide excellent conditions for solar energy production, making it an ideal time for maximizing solar output. Spring also offers favorable conditions, with increasing daylight hours and moderate temperatures.

Optimizing Solar Panel Installation

To maximize year-round solar production in Wenatchee, fixed solar panels should be installed at a tilt angle of 39 degrees facing south. This optimal angle takes into account the location's latitude and seasonal variations in sun position, ensuring the best possible energy capture throughout the year.

Environmental and Weather Factors

Several environmental and weather factors can impact solar production in Wenatchee: 1. Snow: The region experiences snowfall during winter months, which can cover solar panels and reduce their efficiency. Regular panel cleaning and the use of snow-shedding systems can help mitigate this issue. 2. Cloud cover: Wenatchee has a semi-arid climate, but it still experiences cloudy days, particularly in winter. While this affects solar output, the impact is less severe compared to many other locations in the Pacific Northwest. 3. Wildfires: The area is prone to summer wildfires, which can create smoke and haze, potentially reducing solar panel efficiency. Installing panels with anti-soiling coatings can help maintain performance during these events. 4. Temperature extremes: Wenatchee experiences hot summers and cold winters. While solar panels generally perform well in cooler temperatures, extreme heat can slightly reduce their efficiency. Ensuring proper ventilation behind the panels can help mitigate this effect. In conclusion, while Wenatchee's location presents challenges for year-round solar energy production, particularly in winter, it offers excellent potential during summer and spring. With proper installation techniques and maintenance practices, many of the environmental and weather-related challenges can be effectively managed, making solar PV a viable energy option for this 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 Wenatchee

Seasonal solar PV output for Latitude: 47.4221, Longitude: -120.3266 (Wenatchee, 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 Wenatchee, United States

To maximize your solar PV system's energy output in Wenatchee, United States (Lat/Long 47.4221, -120.3266) 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 Wenatchee, 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 Wenatchee, 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	61° 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 Wenatchee, 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 Wenatchee, 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 Wenatchee, United States

The topography around Wenatchee, Washington, is characterized by a diverse and dramatic landscape. Situated in the heart of the state, Wenatchee lies in a valley where the Wenatchee River meets the mighty Columbia River. The city itself is nestled at the base of the eastern foothills of the Cascade Mountains, creating a striking backdrop of rugged peaks and forested slopes. To the west of Wenatchee, the terrain quickly becomes mountainous, with steep, forested hillsides rising to form part of the Cascade Range. These mountains create a rain shadow effect, which results in the area around Wenatchee being much drier than the western side of the Cascades. East of the city, the landscape transitions into a more arid region known as the Columbia Basin. This area features rolling hills, plateaus, and coulees - deep ravines carved by ancient floods. The Columbia River, which flows past Wenatchee, has cut a deep gorge through the surrounding basalt rock formations, creating dramatic cliffs and steep canyon walls.

Potential Areas for Large-Scale Solar PV

When considering areas near Wenatchee for large-scale solar photovoltaic (PV) installations, the regions to the east and southeast of the city offer the most promising conditions. These areas benefit from several factors that make them well-suited for solar energy production: Firstly, the Columbia Basin receives abundant sunshine throughout the year, with clear skies and low precipitation. This high solar insolation is crucial for maximizing the efficiency of solar panels. Secondly, the gently rolling terrain and open landscapes of the Columbia Basin provide ample space for large solar arrays without significant topographical obstacles. Many areas feature flat or slightly sloping land that can easily accommodate extensive solar installations. Specific locations that might be particularly suitable include the plains around the towns of Quincy and Ephrata, located southeast of Wenatchee. These areas offer vast stretches of open land with minimal shading from mountains or forests. Additionally, the region between Wenatchee and Moses Lake could provide excellent opportunities for solar development. This area combines favorable topography with proximity to existing power infrastructure, which is an important consideration for connecting large-scale solar projects to the grid. It's worth noting that while these areas offer great potential for solar PV, any large-scale development would need to carefully consider factors such as land use regulations, environmental impact, and the capacity of the local power grid to accommodate new energy sources.

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.