In recent years, in the crystal silicon solar battery raw materials shortage, thin film solar cell has been of particular importance.

而近年来，在晶体硅太阳电池原资料紧缺的状况下，薄膜太阳电池遭到了特别的注重。

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It seems straightforward, but it is only the improved efficiencies in solar cell and battery technologies, even over the last year, that has made this at all possible.

BBC: NEWS | Science/Nature | 'Eternal planes' to watch over us

Instead of selling individual units, they would offer a low-power system that relied on a solar cell or car battery in remote areas without grid electricity.

FORBES: Running Dry

Instead of selling individual units, they would offer a low-power system that relied on a solar cell or car battery in remote areas that didn't have grid electricity.

FORBES: Magazine Article