Milton, Delaware, located in the Northern Temperate Zone, presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations that potential solar installers should carefully consider.
Seasonal Solar Performance
The solar energy output at this location shows typical temperate zone patterns, with summer providing the strongest generation at 6.55 kWh per day per kW of installed solar capacity. Spring follows as the second-best season with 5.84 kWh per day per kW, making these warmer months ideal for solar energy production. Autumn performance drops to 3.96 kWh per day per kW, while winter presents the most challenging conditions with only 2.40 kWh per day per kW. This represents a nearly three-fold difference between peak summer and winter production, which is typical for mid-Atlantic coastal locations. For fixed panel installations at Milton, Delaware, the optimal tilt angle is 34 degrees facing south to maximize total year-round solar output. This angle is calculated based on the location's latitude and weighted solar irradiance data throughout the year.Local Environmental Factors
Several environmental and weather factors in Milton, Delaware can impact solar production:- Coastal humidity and salt air exposure, which can accelerate corrosion of solar equipment and reduce panel efficiency over time
- Frequent coastal storms and nor'easters that can deposit debris, salt spray, and moisture on panels
- Higher than average cloud cover during certain seasons, particularly in late fall and winter
- Potential for snow accumulation during winter months that can temporarily block panels
Preventative Measures for Optimal Performance
To maximize solar energy production despite these challenges, several installation strategies should be considered: Regular maintenance schedules become particularly important in this coastal environment. Panels should be cleaned more frequently to remove salt deposits and debris that can significantly reduce efficiency. Installing panels with anti-corrosive mounting systems and marine-grade electrical components helps combat the effects of salt air. Proper panel spacing and mounting height can improve snow shedding during winter months and allow better air circulation to prevent moisture buildup. Consider installing monitoring systems to quickly identify performance issues caused by weather-related factors. The seasonal variation in output means that battery storage systems or grid-tie arrangements become especially valuable for maintaining consistent energy availability throughout the year, particularly during the lower-production autumn and 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 Milton, Delaware
Seasonal solar PV output for Latitude: 38.7776, Longitude: -75.3099 (Milton, Delaware, 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 Milton, Delaware, United States
To maximize your solar PV system's energy output in Milton, Delaware, United States (Lat/Long 38.7776, -75.3099) 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 Milton, Delaware, 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 Milton, Delaware, 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 |
|---|---|---|---|
| 22° South in Summer | 43° 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 Milton, Delaware, 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 Milton, Delaware, 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 Milton, Delaware, United States
Topographical Features of Milton, Delaware
Milton sits in the coastal plain region of southern Delaware, characterized by relatively flat terrain with gentle undulations across the landscape. The area lies at a low elevation, typical of Delaware's geography, with most of the surrounding land remaining fairly level throughout the region. This flat topography extends in all directions from Milton, creating an expansive plain that stretches toward the Atlantic coast to the east and inland toward central Delaware to the west.
The immediate vicinity around Milton features a mix of agricultural fields, residential developments, and patches of woodland. The terrain consists primarily of sandy soils common to the Delmarva Peninsula, with occasional small hills and ridges that rarely exceed modest elevations. Wetlands and marshy areas dot the landscape, particularly near waterways and in lower-lying sections where drainage naturally collects.
Several waterways meander through the region, including branches of the Broadkill River system and various tributaries that create shallow valleys and drainage corridors. These water features contribute to the gently rolling character of the landscape while maintaining the overall flat nature of the coastal plain environment.
Optimal Areas for Large-Scale Solar Development
The expansive agricultural fields surrounding Milton present excellent opportunities for large-scale solar photovoltaic installations. These open areas typically feature minimal shading from trees or structures, providing unobstructed access to sunlight throughout the day. The flat to gently rolling topography eliminates concerns about steep slopes that could complicate installation or create shading issues between solar panel rows.
Areas to the north and west of Milton appear particularly well-suited for solar development, where extensive farmland creates large contiguous parcels of relatively flat, open space. These agricultural zones often have existing road access and electrical infrastructure nearby, which can reduce development costs and complexity for solar projects.
The sandy soils prevalent throughout the region generally provide good drainage characteristics, reducing concerns about standing water that could interfere with solar installations. However, developers would need to avoid the wetland areas and marshy zones that are scattered throughout the landscape, as these environmentally sensitive areas typically face regulatory restrictions.
Former agricultural land that has been taken out of active farming represents another promising category for solar development. These areas maintain the beneficial characteristics of open, flat terrain while potentially facing fewer conflicts with ongoing agricultural operations. The proximity to existing electrical transmission infrastructure along major roads and near residential areas could facilitate grid connections for large-scale solar facilities.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 5th of July 2025
Last Updated: Wednesday 6th of August 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

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.




