Solar panel junction boxes

28 April 2010 Power Electronics / Power Management

The SolarSpec junction box design from Molex, with trim profile and robotic-assembly features, simplifies the process of assembling silicon photovoltaic (PV) systems and enables PV panel manufacturers to reduce assembly time and production costs. Installed by mono- and poly-crystalline PV solar module manufacturers directly on to the back of every PV panel produced, they serve as the interface between the conductor ribbons on the panel and the DC input and output cables.

Solar junction boxes contain bypass and blocking diodes to protect the PV panel from reverse current during hours of darkness, if the panels are in shade or if covered by debris. The SolarSpec box contains these diodes together with the DC cable connections in the removable top cover of the housing, thereby facilitating easy field repair or replacement in the event of damage or wear.

The SolarSpec junction box assembly can be attached to the PV solar panel using robotic pick-and-place machines. Exclusively designed spring terminals to connect the base unit directly to the PV ribbon conductors, and terminals with optional solder charge technology, facilitate high-speed assembly and eliminate the need for manual intervention. Double-sided adhesive tape can also reduce assembly cycles, since silicone curing time is not necessary before the panel can be further handled in production.

For more information contact Craig Gibbs, Avnet Kopp, +27 (0)11 809 6100, craig.gibbs@avnet.co.za, www.avnet.co.za

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