US Green Building Council (USGBC) Practice Test

The key idea is where the renewable energy is generated and how it reaches the building. On-site energy is produced directly on the project site—for example, rooftop solar panels or a small wind turbine feeding the building. Off-site energy is generated elsewhere and delivered to the project through the grid or via a green power contract, such as purchasing renewable energy or Renewable Energy Certificates (RECs) that correspond to the building’s consumption. This distinction matters for how LEED credits are earned, since off-site purchases can still count toward credits if they are verifiable and match the project’s energy use. The option that on-site must be solar is too narrow, and the idea that off-site energy is not connected or cannot contribute to LEED credits is inaccurate; off-site energy is typically connected through the grid and can contribute when procured as green power or RECs.