Howell, Michigan in the United States offers varying solar energy potential throughout the year, with significant seasonal differences in electricity generation from solar PV systems. This location in the Northern Temperate Zone experiences distinct seasons that affect solar productivity.
Seasonal Solar Production
Solar panels in Howell generate their highest output during summer months, producing approximately 6.30kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.33kWh/day per kW. Production drops considerably in autumn to 3.12kWh/day, with winter seeing the lowest generation at just 1.92kWh/day per kW of installed capacity.
This pattern creates a clear "high season" for solar generation from late spring through early fall, when approximately two-thirds of the annual solar energy is produced. The substantial difference between summer and winter production (more than three times higher in summer) highlights the seasonal variability at this latitude.
Optimal Installation Angle
For fixed solar panel installations in Howell, the ideal tilt angle to maximize year-round energy production is 36 degrees facing South. This angle optimizes the annual solar harvest by balancing seasonal variations in sun position throughout the year.
Environmental and Weather Considerations
Several factors can impact solar production in Howell:
- Snow accumulation during Michigan winters can significantly reduce output if panels become covered, requiring snow removal systems or steeper installation angles to facilitate natural snow shedding
- Cloud cover is prevalent in the Great Lakes region, particularly during late fall and winter months, contributing to the lower seasonal output
- Tree shading can be an issue in this relatively wooded region, requiring careful site assessment before installation
Preventative measures include installing panels on south-facing roof sections where possible, using microinverters or power optimizers to minimize the impact of partial shading, and considering ground-mounted systems in open areas for properties with significant tree coverage. Snow removal tools or systems with steeper winter tilt angles may be worth considering for maximum winter production.
Despite these challenges, Howell receives sufficient solar radiation to make solar PV systems economically viable, especially when sized appropriately to account for the seasonal variability.
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 Howell
Seasonal solar PV output for Latitude: 42.6854, Longitude: -83.9127 (Howell, 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 36° South in Howell, United States
To maximize your solar PV system's energy output in Howell, United States (Lat/Long 42.6854, -83.9127) throughout the year, you should tilt your panels at an angle of 36° 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 Howell, 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 Howell, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 27° South in Summer | 46° South in Autumn | 56° South in Winter | 36° 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 Howell, 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 Howell, 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 Howell, United States
Howell, Michigan is situated in a region characterized by gently rolling terrain, a product of the area's glacial history. The city sits in Livingston County, which is part of Michigan's Lower Peninsula. The landscape around Howell features modest hills, shallow valleys, and numerous small lakes and wetlands, all sculpted by the retreat of glaciers thousands of years ago. The elevation in and around Howell averages approximately 950 feet (290 meters) above sea level, with subtle variations throughout the area. This rolling topography creates a patchwork of slightly elevated areas interspersed with lower-lying regions. The Grand River, Michigan's longest river, has its headwaters near Jackson to the southwest and flows northward not far from Howell, influencing the local drainage patterns.
Vegetation and Land Use
The natural vegetation around Howell consists of a mix of deciduous forests, open meadows, and wetland areas. Much of the original forest cover has been converted to agricultural land and suburban development. The remaining woodlands primarily feature oak, maple, hickory, and other hardwood species typical of the Midwest's forest ecosystems. Agricultural activities occupy significant portions of the surrounding countryside, with a mix of crop fields, pastures, and orchards dotting the landscape. The suburban expansion from Detroit's metropolitan area has gradually transformed some of the rural character, particularly along major transportation corridors.Potential Areas for Solar PV Development
For large-scale solar photovoltaic (PV) installations, several factors make certain areas around Howell more suitable than others. The gently rolling terrain provides numerous south-facing slopes that could optimize solar exposure throughout the day. These natural inclines, when facing south, receive more direct sunlight than flat terrain, potentially increasing energy production efficiency. Former agricultural lands represent prime opportunities for solar development. These areas typically offer large, contiguous parcels with minimal tree cover and established access roads. Particularly promising are less productive agricultural fields or fallow lands to the west and southwest of Howell, where the terrain flattens somewhat and larger open spaces exist. Areas to avoid would include the numerous wetlands and small lakes that dot the region, as these ecosystems provide valuable habitat and hydrological functions. Similarly, the more heavily forested sections, particularly those with mature hardwood stands, would require significant clearing and present greater environmental challenges. The rural areas south of Howell, extending toward Pinckney and Hamburg Township, offer a good balance of open space, appropriate topography, and proximity to existing electrical infrastructure. Similarly, the areas northwest of Howell toward Fowlerville present relatively flat terrain with substantial open spaces that could accommodate large solar arrays. When considering specific locations, it's worth noting that proximity to existing electrical substations and transmission lines significantly impacts project feasibility. The I-96 corridor, which runs east-west through the region, has associated electrical infrastructure that could potentially support interconnection of new generation facilities. The areas immediately surrounding the city itself are generally less suitable due to higher property values, increasing suburban development, and smaller parcel sizes. The most promising zones for utility-scale solar development lie in the rural buffer zones 5-15 miles from the city center, where larger land parcels, appropriate zoning, and suitable topography converge.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: Monday 9th of June 2025
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.




