Copy link. The investment funds also offer good returns. Interested in learning more. Most early solar farms and a number of very large-scale current solar farms were built using solar thermal technology. When a property catches the attention of a solar developer, they will usually send out a surveyor to determine whether or not the property meets certain criteria, which commonly includes site characteristics such as the following:. Simply put, solar developers need land for their new solar projects, but land is a commodity that is not always widely available, so solar land leases are often the only viable option.