Vertical oven for drying and temporarily storing painted panels (2, 2', 2", 2′′′), said oven comprising racks made of fixed laths for supporting said panels placed on at least two facing columns, further comprising: - A system for uploading/downloading said panels in/from said vertical oven through at least a roller conveyor; - A stacker crane comprising two multiple forks (8', 8") each comprising a plurality of single forks, wherein the first multiple fork is configured to withdraw the panels placed on a first side of said oven while the second multiple fork (8") is configured to withdraw the panels placed on the opposed side of the oven; - wherein on said racks said panels (2", 2′′′) can be placed side by side or alone according to the width of said panels; - A control unit suitable for controlling the uploading/downloading of the panels and/or said stacker crane, said control unit executing a control software comprising the instructions for controlling said uploading/downloading system of panels and/or said stacker crane; wherein there is provided an independent actuator for each single fork forming said multiple forks (8', 8"), which independent actuators are separately controlled by said control unit; said control unit comprising instructions for the independent control of said each actuator of the single forks of said multiple forks (8', 8"); optionally comprising at least one sensor of a system for detecting the dimensions of said panels, which is connected to said control unit; said software comprising instructions configuring the control unit in a suitable way for determining: - The number of the single forks to be actuated, correspondingly to the length of the panel to be withdrawn; - The length of the stroke of said forks correspondingly to the width of the panel (2', 2", 2"') to be withdrawn. - A system for uploading/downloading said panels in/from said vertical oven through at least a roller conveyor; - A stacker crane comprising two multiple forks (8', 8") each comprising a plurality of single forks, wherein the first multiple fork is configured to withdraw the panels placed on a first side of said oven while the second multiple fork (8") is configured to withdraw the panels placed on the opposed side of the oven; - wherein on said racks said panels (2", 2′′′) can be placed side by side or alone according to the width of said panels; - A control unit suitable for controlling the uploading/downloading of the panels and/or said stacker crane, said control unit executing a control software comprising the instructions for controlling said uploading/downloading system of panels and/or said stacker crane; there is provided an independent actuator for each single fork forming said multiple forks (8', 8"), which independent actuators are separately controlled by said control unit; said control unit comprising instructions for the independent control of said each actuator of the single forks of said multiple forks (8', 8"); optionally comprising at least one sensor of a system for detecting the dimensions of said panels, which is connected to said control unit; said software comprising instructions configuring the control unit in a suitable way for determining: - The number of the single forks to be actuated, correspondingly to the length of the panel to be withdrawn; - The length of the stroke of said forks correspondingly to the width of the panel (2', 2", 2"') to be withdrawn. - The number of the single forks to be actuated, correspondingly to the length of the panel to be withdrawn; - The length of the stroke of said forks correspondingly to the width of the panel (2', 2", 2"') to be withdrawn.