An analog maximum power point tracking (MPPT) controller integrated circuit (IC) based on open-circuit voltage method was proposed to enhance the photovoltaic conversion efficiency of solar cell.

为提高光伏电池的光电转换效率，设计一种基于开路电压法的光伏电池最大功率点跟踪(MPPT)控制芯片。

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A little over a decade ago, the best photovoltaic efficiency, or sunlight conversion into electricity, was 10 percent, and now it can reach 40 percent.

大约十年前，光电效率(即光能转换成电能的转换率)只有10%，而现在已经能达到40%。

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A predicted conversion efficiency limitation of 20% for silicon solar cells in practical devices was made by photovoltaic specialists.

光伏界的专家们曾经认为硅太阳电池转换效率在实际器件上的极限为20%。

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Speaking of solar efficiency, this week solar manufacturer Amonix announced that its concentrated photovoltaic technology has set a new efficiency record with a conversion rate of 33.5 percent.

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If, on the one hand, you've got biofuels which represent only a half a percent conversion of sunlight, and let's say you've got photovoltaic cells and concentrated solar power systems, the efficiency of solar in terms of pure conversion is 50-100 times greater.

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