The present invention discloses a novel vehicle-borne power supply, belonging to the technical field of vehicle-borne power supplies. The solved technical problem is that the vehicle-borne power supply can charge electronic equipment in the condition that a vehicle battery voltage is low. The employed technical scheme is that the novel vehicle-borne power supply comprises a shell and a power supply conversion circuit board arranged in the shell, the power supply conversion circuit board comprises a charging control unit, a rechargeable battery unit, an inverter unit, an undervoltage protection unit, a DC power supply output unit and an AC power supply output unit, the front panel of the shell is provided with a solar panel, the right side panel of the shell is provided with a power supply switch, a USB power supply output port and an AC power supply output port, and the left side panel of the shell is provided with a battery capacity indication lamp. The novel vehicle-borne power supply is suitable for a power system.