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Most of us know the basics of photovoltaics (PV): the sun's energy is converted to electrical current through the PV effect and collected via conductive circuits that link together cells, panels and arrays. While many methods exist to connect these circuits, Resistance Welding or Resistance Brazing has proven itself to be one on the most reliable, cost effective and productive. For silicon based microcrystalline panels, where process control of the heat input is critical, resistance brazing is especially well suited.

Miyachi Unitek equipment plays a key role in the joining of these conductive circuits. At the cell level, customers are using either the low power UB25 Linear DC welder or the HF25 high frequency inverter with a light force parallel gap head such as the 50F, the servo-motor driven 72, or a modified 301 electromagnetic head to connect the thin conductive ribbon layout. At the panel level, customers are utilizing the IPB-5000 inverter welder with an 88A/EZ weld head to connect the thin buss bars that interconnect the cells. Finally, at the array level we use the IS-120 or ISA-500CR inverter and the MH-1201 or MH-1301 weld head to connect the larger buss bars assembling the panels into the arrays that can ultimately cover a roof top or solar field in the desert.

Miyachi Unitek has been providing innovative micro-joining solutions to customers for more than 60 years. What can we do for you? Contact us today!