New PV junction box supports silicon wafer module

New PV junction box supports silicon wafer module

New Products |
By eeNews Europe

Crystalline solar modules are widespread and increasingly more cost-effective to manufacture.

The Eco-Si junction box is the first junction box for photovoltaic modules with an IP protection class of IP68. This permits the safe operation of the solar module even under the harshest of conditions. This high protection class was achieved by the consistent use of the ‘Hermetic Sealed’ technology introduced by Yamaichi Electronics. With this technology, the junction box is not composed of individual ‘falling parts’. Instead, the cables and electronic of the junction box are overmolded in a single highly efficient work step. The overmolding process gives the junction box its shape and ensures absolute freedom from leaks.

The Eco-Si is also designed for system voltages of 1500 V instead of the usual 1000 V. This permits higher voltages for future standards requirements as well (TÜV/UL) and application cases in photovoltaics.

The load capacity of 12 A highlights the competence of Yamaichi Electronics in the photovoltaic area.

The Eco-Si junction box comes standard with three SMD safety diodes to protect the module efficiently in case of shadow. Disposal of the resulting heat is no problem, thanks to the ‘Hermetic Sealed’ design. The diodes are hermetically enclosed by the housing of the Eco-Si junction box. They can therefore discharge their heat optimally to the UL-listed plastic of the socket. This avoids overheating. Higher current resistance, less thermal load and thus also lower power loss are the advantages for the end user.

To reduce the costs for module production, fully automated production lines are increasingly in use. The Eco-Si junction box permits simple automation using guide rails and large areas for transport by suction through a robot arm.

The flat design, only 22 mm in height, is easy to stack in production and permits very flat installations.

The Eco-Si J-box is part of the Y-Sol product family, which has now been extended to the point that its TÜV- and UL-certified components permit the complete cabling from the photovoltaic module to the power inverter. In addition to field-assembled plug connectors, quickly mounted assemblies and junction boxes with ‘Hermetic Sealed’ overmolding technology are also part of the product line.
More information about Eco-Si J-Box at

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