Speed-sensitive steering assistance is provided by an electrohydraulic system that runs on the car’s 12-volt system. This low-voltage system powers the on-board accessories, lighting, and infotainment system, and stores power in a conventional lead-acid battery. The roof of the Karma has solar panels that feed the system with up to 120 watts of power on sunny days. While this electricity never powers the wheels directly, it can reduce the amount of low-voltage power pulled from the high-voltage system, and could, in theory, add up to 200 miles of additional range per year. Cool, yes, but it’s mostly there to make a statement, we suspect.