How Solar Arrays Could Help Grasslands Thrive During Drought
A new study from Colorado State University and Cornell University suggests that solar panels could do more than generate clean energy – they might also help grasslands survive drought. Published in Environmental Research Letters, the research shows that co-locating photovoltaic (PV) arrays with grassland ecosystems can reduce water stress, improve soil moisture, and in dry years, even boost plant growth by 20% or more.
A Win-Win for Renewable Energy and Ecosystems
Grasslands are vital ecosystems that support wildlife, store carbon, and provide forage for livestock. But in arid regions like Colorado, they are often stressed by water shortages. Solar panels, which cast partial shade and shed water when it rains, create microclimates that reduce evaporation and help plants hold onto precious moisture.
At an agrivoltaics facility in Longmont, Colorado, researchers tracked grass production over four years. During a dry year, grasses on the east side of solar panels grew up to 90% more productively than in neighboring open fields. Even in normal or wet years, shaded plots outperformed unshaded ones – demonstrating that solar panels can enhance resilience even when water is more plentiful.
Rethinking Solar Design for Maximum Benefit
The study highlights opportunities for solar land-use synergies – using solar facilities not just for energy production, but to support ecosystem stability. While the tested array was designed purely to maximize electricity output, researchers believe small changes in panel design and positioning could unlock even greater environmental benefits.
For example, panels could be tilted to provide more shade during peak heat or allow more light in during critical growing periods. This type of adaptive design could help maximize water efficiency while also supporting diverse plant communities.
Implications for Climate Change and Grassland Restoration
As droughts become more frequent and severe with climate change, the ability of solar panels to mitigate water stress could be even more valuable. Researchers also see potential for using solar facilities to restore degraded grasslands, promoting biodiversity and stabilizing soil while generating renewable energy.
The next phase of research will explore how solar arrays affect C4 grasses, which thrive in hotter, sunnier conditions and dominate the Colorado plains. Early hypotheses suggest that these species may benefit even more from the shade and moisture provided by solar installations.
Eco-Rental Solutions: Supporting Sustainable Innovation
At Eco-Rental Solutions, we’re committed to advancing the tools that help researchers, municipalities, and industries explore solutions at the intersection of renewable energy and environmental health. Our wide range of monitoring equipment supports projects like this by measuring soil moisture, water quality, and air emissions – helping teams generate the data they need to guide sustainable land use.
Contact us today to learn how our rental solutions can support your environmental research or renewable energy project, or send us a request for a quote.