There are several factors to consider when deciding whether a solar array should be ground-mounted or use a tracking system. Here are some things to consider:

1. Site conditions: The site conditions, including the latitude, tilt, and orientation of the solar panels, as well as any shading or obstructions, can impact the performance of the solar array. Tracking systems can help to optimize the orientation of the panels to capture more sunlight, but they may not be suitable for sites with severe shading or other constraints.
2. Electricity production: Tracking systems can increase the electricity production of a solar array by following the sun as it moves across the sky, but they are typically more expensive and complex to install and maintain than ground-mounted systems. It is important to carefully consider the potential increase in electricity production and the associated costs to determine whether a tracking system is a worthwhile investment.
3. Budget and long-term goals: The budget and long-term goals of the project should also be considered when deciding whether to use a tracking system. Tracking systems may have a higher upfront cost, but they may also offer a higher return on investment over the long term.
4. Maintenance and reliability: Tracking systems may require more maintenance and have a higher risk of mechanical failure than ground-mounted systems. It is important to consider the maintenance and reliability of the system when deciding whether to use a tracking system.

Overall, it is important to carefully consider the specific site conditions and the electricity production, budget, and long-term goals of the project when deciding whether to use a ground-mounted or tracking solar array. A professional solar installation company can help to assess the site and provide recommendations based on the specific needs of the project.