Precautions for installation of photovoltaic modules

Rooftop solar is booming, but a photovoltaic (PV) module is not a passive slab—it is a live DC generator the moment light hits it. New safety pushes stress five non-negotiable field rules.

First, kill the voltage before touching wires. Crews must lay an opaque cover (cloth, cardboard, dedicated shield) over every module before cabling, because an uncovered panel in sunlight can push hundreds of volts through bare cable ends. Sharp’s and Jinko’s install manuals, alongside China’s provincial PV construction codes, all mandate this step.

Second, dress and tool up right. No metal rings, watches or bracelets—they bridge contacts and turn a spark into a burn. Only dry, insulated hand tools, insulating gloves and rubber-soled shoes are allowed on the roof.

Third, weather is a hard stop. Rain, snow, heavy fog or winds above six on the Beaufort scale cancel the job. Wet terminals plus DC equals arc flash and fatal shock; Philippine DTI and Nigerian NEMSA both cite faulty wet-weather wiring in recent fire probes.

Fourth, ground the frame. Bonding cables go to the pre-drilled midpoint of the aluminum frame, not the glass, giving fault current a safe path and satisfying 2026 updates to Australia’s CEC-approved module list and Thailand’s TISI draft rules.

Fifth, treat broken modules as live hazards—tape off, isolate, replace; never step on glass.