Greenfield, California presents a reasonably good location for year-round solar energy generation, though with notable seasonal variations that potential solar installers should understand.

Seasonal Solar Performance

The solar energy output at this Northern Temperate Zone location shows strong seasonal patterns. Summer delivers the highest production at 8.11 kWh per day per kW of installed capacity, making it the peak season for solar generation. Spring follows as the second-best performing season with 7.32 kWh per day per kW, offering nearly as much energy production as summer. Autumn performance drops significantly to 4.94 kWh per day per kW, while winter represents the lowest production period at just 3.22 kWh per day per kW of installed solar capacity. This means winter produces less than 40% of the energy that summer generates.

Optimal Installation Configuration

For maximum year-round energy production at this Greenfield location, solar panels should be installed at a fixed tilt angle of 31 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for daily solar potential.

Local Environmental Factors

Several environmental and weather factors in the Greenfield area can impact solar energy production:

• Agricultural dust and particulates from surrounding farmland can accumulate on solar panels
• Marine layer fog from the nearby Pacific Ocean can reduce solar irradiance, particularly during morning hours
• Seasonal wildfire smoke from California's fire-prone regions can temporarily block sunlight
• Valley temperature inversions may trap haze and reduce solar clarity

Preventative Measures for Better Performance

To maintain optimal energy production despite these challenges, several installation strategies can help: Regular cleaning schedules become essential in this agricultural region. Installing panels with anti-soiling coatings or self-cleaning glass can reduce dust accumulation. Proper panel spacing allows for better airflow and natural cleaning from rain. Choosing high-quality panels that perform well in diffused light conditions helps during foggy periods. Installing panels with good low-light performance characteristics ensures better energy capture when marine layer conditions reduce direct sunlight. Monitoring systems can help identify when smoke or other atmospheric conditions are affecting performance, allowing for better energy management planning. Additionally, ensuring panels are installed with adequate ventilation helps maintain efficiency during the hot Central Valley summers.

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 Greenfield, California

Seasonal solar PV output for Latitude: 36.3171, Longitude: -121.2391 (Greenfield, California, 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 31° South in Greenfield, California, United States

To maximize your solar PV system's energy output in Greenfield, California, United States (Lat/Long 36.3171, -121.2391) throughout the year, you should tilt your panels at an angle of 31° 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 Greenfield, California, 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 Greenfield, California, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
20° South in Summer	41° South in Autumn	51° South in Winter	29° 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 Greenfield, California, 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 Greenfield, California, 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 Greenfield, California, United States

Topography Around Greenfield, California

Greenfield sits in the heart of the Salinas Valley, one of California's most prominent agricultural regions. The terrain here is characterized by relatively flat to gently rolling valley floor, positioned between two significant mountain ranges. To the east rise the Gabilan Mountains, while the Santa Lucia Range forms the western boundary of the valley. This creates a natural corridor that runs roughly northwest to southeast, following the path of the Salinas River.

The immediate area around Greenfield features predominantly level agricultural land with minimal elevation changes. The valley floor sits at approximately 300 feet above sea level, making it an ideal location for farming operations that have dominated the landscape for decades. The terrain gradually slopes upward as it approaches the foothills of both mountain ranges, but the transition is generally gradual rather than abrupt.

The Salinas River meanders through the valley, though its presence creates only minor topographical variations in the immediate vicinity of Greenfield. The river system has deposited rich alluvial soils across the valley floor over thousands of years, contributing to the area's agricultural productivity while maintaining the relatively uniform elevation that characterizes the region.

Optimal Areas for Large-Scale Solar Development

The flat to gently sloping terrain throughout the Salinas Valley presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas would be the expansive valley floor stretches that extend in all directions from Greenfield, particularly those areas with minimal agricultural value or those transitioning away from farming operations.

Areas to the east and southeast of Greenfield offer particularly promising conditions, where the valley floor remains level but begins its gradual transition toward the Gabilan Mountains. These locations provide the dual benefits of flat installation terrain while potentially offering slight elevation advantages that can improve solar exposure without creating significant construction challenges.

The western portions of the valley floor, between Greenfield and the Santa Lucia Range foothills, also present viable options for solar development. The terrain here remains predominantly flat with good accessibility via existing agricultural roads and infrastructure. The key consideration in these areas would be avoiding prime agricultural land while taking advantage of the unobstructed southern exposure that the valley orientation provides.

Areas closer to the actual mountain foothills would be less suitable for large-scale solar installations due to increasing terrain complexity, potential shading issues from elevated topography, and construction challenges associated with steeper slopes. The optimal zone for solar development extends across the central valley floor, where the combination of level ground, good accessibility, and minimal topographical obstacles creates ideal conditions for efficient installation and maintenance of solar arrays.

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.