Mount high-efficiency solar panels on the container roof or adjacent racks and charge a battery bank to supply power. For example, BoxPower's 20-foot SolarContainer can hold 4–60 kW of PV on its roof – enough for heavy-duty loads. . There are many ways to skin a cat, and even more ways to add solar power to a shipping container. It's more expensive since. . To power a container, you have three main choices: Grid connection: If a utility line is accessible, you can trench cable and feed the container's electrical panel. They harness sunlight, converting it into electricity, providing a dependable and renewable energy source without reliance on traditional grid power. A typical solar power system for a telecom site. . In such a system, the charge controller is both “heart and brains” of the outfit, controlling the PV/solar-generated electricity flowing from the panels, or modules, into batteries for storage as well as the DC output to power connected loads, maintaining both system operation and battery health.