Take Africa -- there are about 110 million households in the region without access to the grid, compared with only 20 million who are connected.
拿非洲为例，在这一地区，有大约一亿一千万的家庭没有介入电网，与之形成对比的是只有两千万家庭接入电网。
Not only the of maximum power point tracking and islanding protecting techniques, but also the technique for inverter to connected with grid are discussed in detail.
通过对光伏并网逆变器最大功率点跟踪、孤岛效应和并网控制等问题的分析，提出了具体的解决方案。
Not only the of maximum power point tracking and islanding protecting techniques, but also the technique for inverter to connected with grid are discussed in detail.
通过对光伏并网逆变器最大功率点跟踪、孤岛效应和并网控制等问题的分析，提出了具体的解决方案。
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