The solar container behind the meter refers to

Residential and commercial solar panels are considered to be behind-the-meter, as are residential and commercial solar batteries —the energy that is produced and/or stored by these systems is separate from the grid and does not need to be counted by a meter before being used, so. All grid-tied energy systems are situated either "in front of the meter" or "behind the meter," and as more and more electric customers take control of their production and usage, it is important to understand the fundamental differences between these two positions on the larger electric grid. These systems directly impact the energy consumption and costs of the end-user, typically involving. These systems—solar panels, batteries, or efficient appliances—mainly power the building, reduce grid use, lower bills, and can sell excess energy for income or credits.