The definition standard of fuel solar container is

At its core, a solar power container is a mobile solar power station engineered inside a standard ISO shipping container. The structure is rugged, transportable, and weather-resistant, making it suitable for deployment in harsh conditions. [pdf]

Definition of solar container system

A solar container is a pre-assembled, portable energy system that combines solar photovoltaic panels, energy storage batteries, and power electronics within a weatherproof enclosure. [pdf]