Mitsubishi has applied leading-edge technologies from its space-related applications to terrestrial systems to create high-performance photovoltaic power-generation systems for an astonishing range of applications. Mitsubishi Electric successfully produced the first cells in Japan that do not require solder coatings. This was a milestone in the develop- ment of environmentally friendly composite materials and manufacturing processes for the silver electrodes used on the surfaces of crystalline silicon photovoltaic cells. Their PV modules are now made using lead-free solder, completely eliminating lead from the manufacturing process. The 175-watt and larger modules are designed for use in high-voltage grid-tie applications, but can be used in large industrial and off-grid applications for battery charging if the system includes an appropriate MPPT charge controller such as the OutBack MX-60, Apollo T80 or BlueSky Solar Boost. These modules use 50 square poly-crystalline 156mm cells in series behind tempered glass with anodized aluminum frames, and Multi-Contact locking connector output cables. Positive and negative cables come from junction boxes at opposite ends of the module. The 125-watt modules have Multi-Contact locking connector output cables and are optimized for 12-volt battery charging with 36 cells in series. The 120-watt module has 36 cells, a clear-anodized frame and a conduit-ready junction box. ASK ABOUT OUR VOLUME DISCOUNTS! Made in Japan. UL Listed. 10-year 90% power warranty, 25-year 80% power warranty. Power tolerance +/- 3%