The exhaust gas energy recovery device is connected to the power generation device through the power generation device driven by the turbine rotated by the exhaust gas, the switching element connected to the power generation device, and the switching device, and connected to the first power storage device. The terminal voltage of the first power storage device is smaller than the terminal voltage of the second power storage device, and the switching element is provided with one terminal and the second terminal connected to the power generation device and connected to the second power storage device. And switching the charging destination to be charged by the power generation device to either the first power storage device or the second power storage device based on the magnitude of the DC voltage output from the power generation device.
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