Portable Pv System To Come With Rechargeable Battery

Portable PV System to Come With Rechargeable BatteryMie University announced a lightweight, portable solar power generation system equipped with a rechargeable battery.
Mie University aimed to develop a system that can be easily used at the time of disaster and commercialized it. The university considers it as a solar power generation system that is equipped with a rechargeable battery, light in weight so that even a woman can carry it and can be used whenever, wherever and by anyone (e.g. when power supply is cut off, at the time of disaster, etc).

Nabel Co Ltd (Iga City, Mie Prefecture), which deals with "bellows" protective materials, formed a plan and developed the system in collaboration with Masaaki Bannai, a specially-appointed professor at the Graduate School of Regional Innovation Studies, Mie University.

Though there are products similar to the new system, they have been used only for leisure partly because of their small battery capacities.

Different from those old products, the newly-developed product has a larger battery capacity, is resistant to coldness, warmness, wind, rain, snow, etc and hardly deteriorates even after more than 10 years of use. Therefore, its power supply capacity will not decrease much over time.

On sunny days, the battery of the new system can be fully charged in about three hours. The system can charge a mobile phone for about 20 hours or power a small electric fan for about five hours. Equipped with a lithium-ion (Li-ion) rechargeable battery, it has an output of 120W and a capacity of 200Wh. Its dimensions and weight are 140 x 45 x 370mm and about 2kg, respectively.

The solar panel is an amorphous silicon thin-film type, which is lightweight and flexible. The solar power generation system comes with a foldable unit of nine panels and can be easily carried. Each panel measures approximately 50 x 42cm and weighs about 3kg.

A special sheet is used for sealing, and the system can be stably used even under severe usage environments. If one of the panels is damaged, it is possible to exchange only the damaged panel.

The panels are connected in parallel. So, when some of the panels are shaded, the other panels can generate electricity without lowering output.

It took about two years to develop the system. It was developed by using Nabel's weight reduction and high-reliability technologies and based on advice from Bannai. The product is scheduled to be released in September 2016 at a price of about ¥200,000 (approx US$1,889).