What Is a Solar Farm?

Solar farms vs. rooftop solar

When exploring solar energy options, it’s helpful to understand the differences between solar farms, rooftop solar and small ground-mounted systems. Each serves a unique purpose and varies in size, ownership and output.

How solar farms work

Solar farms are massive installations consisting of photovoltaic (PV) solar panels that convert sunlight into electricity. Unlike rooftop systems, solar farms are ground-mounted and come in various shapes and sizes. They serve as massive power plants, generating clean energy for widespread consumption.

Solar farms use panels with solar cells to capture sunlight and turn it into electricity. These panels create a stream of electrons, producing direct current (DC) electricity. DC electricity isn’t suitable for homes and businesses, however, so it goes through inverters to convert it into alternating current (AC) electricity. The AC electricity is then connected to the electrical grid, supplying power to homes, businesses and communities.

Types of solar farms

There are a few different types of solar farms, but the two major types are utility-scale solar farms and community solar farms.

Learn more about solar energy and the benefits of solar farms by attending educational workshops and events.

Utility-scale solar farms

Utility-scale solar farms, also known as solar power plants or solar parks, are massive areas filled with solar panels. These installations can generate hundreds of megawatts of electricity, enough power to supply electricity to thousands of homes and businesses.

Community solar farms

Community solar farms, also called solar gardens or shared solar projects, are smaller-scale solar initiatives that bring renewable energy to local communities. These farms are more affordable and accessible than utility-scale farms, and they provide an opportunity for individuals and businesses to invest in a portion of the solar installation and receive energy credits or reduced electricity bills in return.

» MORE: What is community solar?

Environmental and land use considerations

Solar energy projects, including utility-scale solar farms and rooftop systems, have distinct environmental and land use effects. Large solar farms typically require 5 to 10 acres per MW of installed capacity. Fixed-tilt systems usually need less space than tracking systems, which follow the sun. Siting depends on land slope, soil stability, sunlight exposure, and access to transmission lines, roads and substations to reduce infrastructure costs and energy loss.

Solar energy reduces carbon emissions compared with fossil fuels and improves air quality. Rooftop installations avoid additional land use and limit ecological disturbance. However, solar farms can disrupt habitats, remove native vegetation and affect wildlife, especially in desert or grassland areas.

Mitigation strategies include the following:

• Using brownfields, degraded land or rooftops instead of undeveloped land
• Planting pollinator-friendly vegetation and maintaining wildlife corridors
• Consulting with ecologists to identify sensitive areas and guide protective measures
• Regulations at federal, state and local levels, such as the National Environmental Policy Act

With careful planning, solar projects can provide clean energy while minimizing land and ecological impacts.

How to start a solar farm

Before making the jump and starting a solar farm, it's crucial to consider the various steps involved in the process. The most important is ensuring it’s feasible in your area. A feasibility check, which includes an assessment of solar resources and environmental impact, a financial analysis and a technical assessment, is foundational for any solar farm project — so make sure to work with experienced solar professionals.

Work with experienced solar engineers and consultants to ensure thorough assessments during the feasibility check and a reliable analysis of your site.

1. Assess solar resources

To gauge the solar energy potential of a site, you need to analyze historical weather data and solar radiation levels. This helps you determine how much sunlight the area receives and whether it’s sufficient for generating enough electricity from solar panels.

PRO TIP: The Environmental Protection Agency has a resource called the RE-Powering Mapper for finding an ideal site for a solar farm.

2. Analyze finances

For you to ensure the success of your solar farm, it’s crucial to conduct thorough research on reputable suppliers and obtain competitive quotes for essential components (such as solar panels, inverters, mounting structures and electrical components). You should also budget for site preparation, panel mounting, electrical wiring and grid connection, taking into account labor and associated installation costs.

» MORE: How much do solar panels cost?

It’s important to allocate funds for periodic maintenance, like panel cleaning, monitoring and repairs. By considering these costs upfront, you can plan for the long-term sustainability and financial viability of your solar farm.

You can also explore financing options like loans, power purchase agreements (PPAs) and partnerships with investors. Explore financial incentives like tax credits, grants and rebates offered by government entities or utility companies to ensure seamless grid connection and potential offtake agreements.

» LEARN: How do solar loans work?

3. Conduct a technical assessment

Examine your land availability, grid connectivity and potential technical limitations. This ensures the site has enough space for solar panels, access to transmission lines for connecting to the grid and minimal obstacles (e.g., shading or physical barriers) that could hinder solar energy production.

4. Assess the environmental impact

It’s critical to evaluate potential ecological effects and ensure compliance with environmental regulations. This helps identify any adverse impacts on local wildlife, habitats or ecosystems and find ways to minimize or mitigate them.

5. Secure permits and regulations

Familiarize yourself with local permits, zoning regulations and utility interconnection requirements. Engage with relevant authorities and utility companies to obtain necessary permits and approvals.

6. Consider engineering and design

Collaborate with experienced solar engineers to design an efficient and effective solar farm layout. This includes optimizing panel arrangement, electrical system design and grid interconnection plans.

Solar farm profitability

The profitability of a solar farm depends on several key factors: sunlight, policy incentives and Power Purchase Agreement (PPA) rates. Solar resource quality is the most fundamental driver. Regions with high solar irradiance and longer daily sunlight hours produce more electricity per installed megawatt, directly increasing revenue. Even small differences in sunlight can significantly affect annual energy output and long-term returns.

Government incentives also play a major role. In the U.S., the Investment Tax Credit (ITC) allows developers to deduct a percentage of project costs from federal taxes, currently around 30%. Accelerated depreciation under the Modified Accelerated Cost Recovery System (MACRS) further reduces taxable income in the early years of a project. State-level incentives, such as renewable energy credits or grants, can provide additional financial support, improving overall project economics and shortening payback periods.

PPAs are equally important. A PPA is a long-term contract between the solar farm and an electricity buyer, often a utility or commercial customer. Locked-in rates provide predictable revenue streams, reduce market risk and enhance financing prospects. Higher PPA rates or longer contract terms increase the certainty and size of cash flows, which improves return on investment (ROI).

Together, these factors determine whether a solar farm achieves a typical payback period of six to 10 years.

Benefits of solar farms

When done right, solar farms can both benefit the environment and benefit you financially.

• Environmental impact: Solar farms reduce carbon emissions and help combat climate change by generating clean, renewable energy. By harnessing the power of the sun, they help mitigate the environmental impact associated with traditional energy sources. This transition away from fossil fuels is essential to creating a greener and more sustainable planet.
• Energy independence: Solar farms provide an opportunity for homes and businesses to generate their own electricity, reducing reliance on external energy sources. This independence offers stability, especially during power grid outages or disruptions, ensuring a consistent power supply.
• Cost savings: Solar energy can lead to substantial cost savings on electricity bills. By utilizing solar power, solar farms help homeowners and businesses to generate their own energy and potentially offset their consumption from the grid. (For example, as of publishing, community solar subscribers in California receive a 5% to 10% discount off traditional electricity costs over the course of a year.)
• Revenue generation: In certain cases, solar farms can generate additional revenue streams. With net metering or feed-in tariffs, for instance, excess electricity can be sold back to the grid. This arrangement can result in significant financial benefits for solar farm owners. By producing and selling surplus energy, solar farms have the potential to generate revenue and contribute to their long-term financial sustainability.

» MORE: Greenest states in the U.S.