Bristol, Pennsylvania, located in the Northern Temperate Zone, offers varying potential for solar energy generation throughout the year. This location experiences significant seasonal fluctuations in solar production, which is typical for mid-latitude regions in North America.

Seasonal Solar Production

The solar PV output at this location shows marked seasonal differences. Summer provides the most abundant solar resource with 6.03kWh per day for each kilowatt of installed capacity. Spring follows closely behind with 5.43kWh/day. Production decreases considerably in autumn to 3.48kWh/day, while winter sees the lowest output at just 2.12kWh/day per installed kilowatt.

This pattern creates a roughly 3:1 ratio between the best and worst seasons, with summer producing nearly three times the electricity of winter months. The substantial drop in winter production is typical for locations at this latitude (approximately 40°N) due to shorter days and lower sun angles during the winter months.

Optimal Panel Installation

For fixed panel installations in Bristol, the ideal angle to maximize year-round production is 35 degrees tilted toward the South. This angle represents the mathematically optimal position based on the location's latitude and seasonal solar patterns, accounting for the Earth's elliptical orbit and weighted by the daily PV potential.

Environmental Considerations

Several environmental factors in Bristol could impact solar production:

• Snow accumulation in winter months can temporarily reduce output unless panels are installed at steep enough angles for snow to slide off naturally.
• Deciduous tree coverage, common in Pennsylvania, may create seasonal shading issues as trees leaf out in spring and summer.
• The region experiences approximately 119 precipitation days annually, which can temporarily reduce solar efficiency.

To mitigate these challenges, installations should include regular maintenance plans for snow removal when necessary, careful site assessment to minimize tree shading, and quality inverters that perform well in variable light conditions. Panel arrays should also be positioned to avoid morning fog effects from the nearby Delaware River.

Overall Assessment

Bristol represents a moderately good location for solar PV, with excellent production during spring and summer months that can offset the reduced winter output. The annual average production makes solar viable, though seasonal variability should be accounted for in system sizing. With proper installation at the recommended 35-degree tilt angle and attention to local environmental factors, solar PV systems in this location can provide significant energy benefits, particularly from March through September.

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 Bristol, Pennsylvania

Seasonal solar PV output for Latitude: 40.1007, Longitude: -74.8518 (Bristol, Pennsylvania, 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 35° South in Bristol, Pennsylvania, United States

To maximize your solar PV system's energy output in Bristol, Pennsylvania, United States (Lat/Long 40.1007, -74.8518) throughout the year, you should tilt your panels at an angle of 35° 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 Bristol, Pennsylvania, 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 Bristol, Pennsylvania, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
24° South in Summer	44° South in Autumn	55° South in Winter	33° 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 Bristol, Pennsylvania, 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 Bristol, Pennsylvania, 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 Bristol, Pennsylvania, United States

The topography around Bristol, Pennsylvania, situated at approximately 40.1007°N, 74.8518°W, is characterized by gently rolling terrain typical of the Delaware Valley region. This area lies within the Atlantic Coastal Plain physiographic province, which features relatively flat to moderately undulating landscapes with modest elevation changes. Bristol itself sits along the western bank of the Delaware River, which forms a significant topographical feature in the region. The immediate vicinity of Bristol presents a mix of developed urban and suburban areas interspersed with open spaces. The terrain gradually rises as one moves westward from the Delaware River, though the elevation changes remain subtle throughout the region. Small hills and shallow valleys dot the landscape, creating minor undulations rather than dramatic topographical features. The average elevation in the area is approximately 20-40 feet above sea level, with minimal steep slopes that would impede development.

Surrounding Topographical Features

To the east of Bristol lies the Delaware River, a major waterway that has shaped the region's geography and development patterns. The river valley creates a broad, flat floodplain along its edges before the land begins to rise gradually. This river corridor has historically influenced settlement patterns and land use in the region. The western portions of the Bristol area transition into slightly more elevated terrain, though still maintaining the generally gentle character of the region. Small streams and creek valleys create natural drainage systems that have carved subtle depressions in the landscape. These waterways generally flow eastward toward the Delaware River.

Potential Areas for Solar PV Development

When considering large-scale solar photovoltaic (PV) development in the Bristol region, several factors related to topography become important. The most suitable areas would generally include: Former industrial sites and brownfields represent prime opportunities for solar development in this region. The Bristol area has a history of industrial activity, leaving behind several large, flat parcels that could be repurposed for solar energy generation. These sites typically have minimal vegetation, reduced environmental sensitivity, and are already connected to electrical infrastructure. Agricultural lands to the west and northwest of Bristol offer another potential opportunity for solar development. These areas feature relatively flat terrain with minimal shading from natural features, making them technically suitable for solar arrays. However, the conversion of productive farmland to solar use presents important land-use considerations that would need to be carefully evaluated. The gently sloping areas that face south or southwest would be particularly advantageous for solar energy capture. While the region lacks dramatic hills, even the subtle south-facing slopes can improve solar panel efficiency compared to perfectly flat installations. Areas with well-drained soils would also be preferable, as they reduce potential installation complications and maintenance issues. The moderately well-drained soils found in portions of the higher ground west of Bristol would be more suitable than the occasionally saturated soils closer to the Delaware River and its tributaries. It's worth noting that the relatively dense development pattern in and immediately around Bristol may limit opportunities for very large-scale solar installations. The most promising locations for substantial solar farms would likely be found in the less densely developed areas to the west and northwest, where larger contiguous parcels of suitable land might be available.

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.