Photovoltaic optimizer

The utility model provides a photovoltaic optimizer, the photovoltaic optimizer comprises a cover body, a heat dissipation plate, a mainboard and an insulation support member, the cover body is fixedly connected with the heat dissipation plate, and an accommodating cavity is formed between the cover body and the heat dissipation plate; the main board is located in the containing cavity, the insulation supporting piece is installed between the main board and the heat dissipation board and used for supporting the main board, the side face, in the first direction, of the insulation supporting piece is provided with at least one annular boss or at least one annular groove, and the first direction is perpendicular to the plane where the main board is located. According to the photovoltaic optimizer, the annular boss or the annular groove is arranged on the side face of the insulation supporting piece on the creepage path, the creepage distance is increased, the size of the whole photovoltaic optimizer or parts is