Why herbicides are not the best solution for solar parks

Vegetation management is a critical part of the efficient operation and long-term performance of any solar park. In an effort to reduce maintenance costs, some operators rely on herbicides to control grass and weeds.

At first glance, this may appear to be a simple and cost-effective solution. In the long run, however, the use of herbicides often leads to increased risks, higher maintenance costs, and negative impacts on the overall condition of the site.

1. Risk to cables, equipment, and infrastructure

The use of chemical herbicides can create several operational risks, including:

• damage to the vegetation environment around cable routes;

• soil erosion and exposed ground surfaces;

• increased accumulation of dust and mud on solar panels;

• drainage and site accessibility issues.

Over time, these factors can increase the need for additional maintenance, inspections, and infrastructure repairs.

2. Herbicides do not provide a long-term solution

After treatment, vegetation may temporarily dry out, but:

• the root system often remains active;

• vegetation quickly regrows;

• more aggressive weed species may appear;

• repeated chemical treatment becomes necessary.

This creates a continuous cycle of reapplication and long-term dependence on chemical solutions.

3. Negative environmental impact

An increasing number of solar investors and operators are adopting sustainable maintenance practices aligned with ESG policies and environmental standards.

The use of herbicides may:

• negatively affect soil quality and microorganisms;

• impact insects and local wildlife;

• create runoff risks after heavy rainfall;

• lead to future regulatory restrictions or environmental compliance concerns.

For large-scale photovoltaic sites, this can also become a significant reputational consideration.

4. Increased fire risk during summer months

Vegetation treated with herbicides often dries out and remains beneath the panels and around the supporting structures.

During periods of high temperatures, this may increase:

• the risk of fire ignition;

• the accumulation of dry biomass;

• difficulties during site inspection and maintenance activities.

Regular professional mowing allows for better vegetation control and helps maintain a cleaner and safer operating environment.

5. Mechanical mowing is a safer and more sustainable alternative

Modern remote-controlled mowing equipment enables:

• safe operation between solar panels;

• efficient maintenance of difficult and sloped terrain;

• minimal risk to infrastructure;

• improved visual and operational control of the site.

At TrenoTech, we use specialized equipment for professional vegetation management in solar parks and industrial areas.

Our approach is focused on:

• efficiency;

• safety;

• sustainability;

• long-term site maintenance and operational reliability.