Solar Power - Product Features
Lead Free Solder
Eco-conscious Manufacturing Methods
As a large-scale manufacturer with a keen awareness of our responsibility to the environment,
Mitsubishi Electric is committed to the development of cleaner, more efficient manufacturing
methods, and actively takes a leadship role. For example, in January 2003 we became the first
among Japanese crystalline silicon photovoltaic cell manufacturers to begin volume production
of solderless cells and modules with lead-free solder.
First in Japan: Lead-free solder module and more
Traditionally, lead solder coating has been required to ensure that PV modules remain moisture resistant and
weatherproof for years on end. By developing environmentally friendly composite materials and manufacturing
processes for silver electrodes used on the surface of crystalline silicon photovoltaic cells, Mitsubishi
Electric has succeeded in producing Japan’s first cells that do not require a solder coating. We also now
use lead-free solder for the solder and solder plating members used in the cell modularization process.
Lead-free solder photovoltaic module, solderless cell configuration
Five percent energy reduction during manufacturing
We have simplified our manufacturing methods in ways that create a better product while
increasing productivity. Reliable, lead-free fabrication techniques that do not use solder
coating improve the power efficiency of each individual cell. They also reduce work steps to
provide for greater manufacturing yield. Overall, this realizes a five percent reduction in
energy use during the manufacturing process.
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