NOVELTY - The device has a circuit formed by a solar cell panel device, an automatic track control device (20) and a large-power direct current load (2). The automatic track control device consists of a track circuit (3), a sample circuit (4), an amplification circuit (5), a comparison and measurement circuit (6), a feedback circuit (7), a vector circuit (8), a calculation circuit (9), a triggering circuit (10), a multi-pole boosting circuit (11), an added current increasing circuit (12), a pulse resonance vibration circuit (14) and a reverse charging interference prevention circuit (15).    USE - Small power type solar charging device for charging a large-power direct current load i.e. rechargeable battery pack (claimed). Uses include but are not limited to warship, an aircraft carrier, a submarine, a ship, a warplane, a satellite, an electric car or a building power station.    ADVANTAGE - The device automatically regulates periodical variation functions of internal connected and cut switches, automatically controls and tracks variations of voltage and current of the different loads, widens the pulse wave, reduces the photoelectric secondary conversion frequency and power consumption and inner resistance and improves output power correspondingly, so that the device provides sufficient energy in a quick manner. The device is simple in structure and convenient to use.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a small power type solar charging device for charging a large-power direct current load.'(Drawing includes non-English language text)'    Large-power direct current load (2)    Track circuit (3)    Sample circuit (4)    Amplification circuit (5)    Comparison and measurement circuit (6)    Feedback circuit (7)    Vector circuit (8)    Calculation circuit (9)    Triggering circuit (10)    Multi-pole boosting circuit (11)    Added current increasing circuit (12)    Pulse resonance vibration circuit (14)    Reverse charging interference prevention circuit (15)    Automatic track control device (20)