Solar PV Analysis of Winchester, United States
Winchester, Virginia is a decent place for generating solar energy year-round, but it's not perfect. During the summer and spring seasons, you can expect to generate a good amount of electricity from solar panels due to longer daylight hours and more direct sunlight. You can expect around 6.19 kilowatt-hours (kWh) per day in the summer and 5.40 kWh per day in the spring for every kilowatt (kW) of solar you have installed.
However, during autumn and winter months when there are fewer daylight hours and less direct sunlight due to the tilt of Earth's axis, your solar panels will produce less electricity - about 3.61 kWh/day in autumn and only about 2.20 kWh/day in winter.
To get the most out of your solar panels throughout the year at this location, they should be installed at an angle facing southward tilted at around 34 degrees. This position takes advantage of how much sun Winchester gets over all four seasons.
There might be some local factors that could affect how well your solar installation performs though:
1) Weather: Winchester experiences all four seasons with hot summers and cold winters which can lead to snowfall that may cover up your panels temporarily reducing their output.
2) Trees or buildings: If there are tall trees or buildings nearby that cast shadows on your panel during parts of the day then this will reduce their output too.
3) Dust or debris: Over time dust or other debris like leaves could build up on your panels which would also lower their performance.
You can address these issues by:
1) Regularly checking if any snow needs clearing off after heavy falls.
2) Assessing if any trees need trimming back or consider installing somewhere else if building shadows are an issue.
3) Cleaning off any dust or debris from time-to-time as needed - just make sure not to scratch them!
In summary - while Winchester isn't the absolute best place for solar, it's still pretty good especially in the summer and spring months. Just keep an eye out for local factors that might affect your panels' performance and take steps to address them as needed.
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 Winchester
Seasonal solar PV output for Latitude: 39.1876, Longitude: -78.1857 (Winchester, 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 Winchester, United States
To maximize your solar PV system's energy output in Winchester, United States (Lat/Long 39.1876, -78.1857) 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 Winchester, 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 Winchester, 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 | 44° South in Autumn | 54° 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 Winchester, 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 Winchester, 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 Winchester, United States
Winchester is located in the Shenandoah Valley region of Virginia, United States. The topography consists mainly of rolling hills and valleys with a few mountain ranges such as the Blue Ridge Mountains to the east and Appalachian Mountains to the west. It's not particularly flat but there are open spaces suitable for large scale solar PV installations.
The most suited areas nearby for large-scale solar PV would be:
1. Open fields: Winchester has many agricultural lands and open fields that could be suitable for installing solar panels.
2. Industrial zones: There are several industrial zones around Winchester which have large rooftops or unused land where solar panels could be installed.
3. Brownfield sites: These are previously developed lands that have potential for redevelopment, such as old factories or mines.
However, it's essential to consider factors like sun exposure (solar irradiance), proximity to power grids, zoning regulations and environmental impact before deciding on a location for a large-scale solar installation.
In terms of sun exposure, Winchester receives about 5-6 hours of peak sunlight per day on average which makes it fairly suitable for harnessing solar energy.
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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Sunday 28th of April 2024
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.
