確que保bao光guang伏fu發fa電dian係xi統tong所suo發fa的de電dian力li是shi直zhi接jie供gong給gei當dang地di負fu荷he用yong電dian ，而er不bu饋kui送song至zhi電dian網wang。防fang逆ni流liu控kong製zhi器qi實shi時shi監jian控kong並bing網wang點dian網wang側ce的de電dian壓ya與yu電dian流liu ，一yi旦dan發fa現xian向xiang電dian網wang輸shu入ru能neng量liang，會hui立li即ji通tong過guo通tong訊xun控kong製zhi逆ni變bian器qi降jiang低di輸shu出chu電dian流liu，減jian少shao光guang伏fu發fa電dian係xi統tong的de發fa電dian功gong率lv；當(dang)用(yong)戶(hu)負(fu)載(zai)變(bian)化(hua)時(shi)，防(fang)逆(ni)流(liu)控(kong)製(zhi)器(qi)即(ji)時(shi)調(tiao)整(zheng)光(guang)伏(fu)發(fa)電(dian)係(xi)統(tong)的(de)發(fa)電(dian)功(gong)率(lv)。當(dang)出(chu)現(xian)通(tong)訊(xun)故(gu)障(zhang)或(huo)其(qi)他(ta)係(xi)統(tong)故(gu)障(zhang)時(shi)，防(fang)逆(ni)流(liu)控(kong)製(zhi)器(qi)會(hui)控(kong)製(zhi)輸(shu)出(chu)接(jie)觸(chu)器(qi)斷(duan)開(kai)，從(cong)而(er)徹(che)底(di)停(ting)止(zhi)向(xiang)電(dian)網(wang)供(gong)電(dian) ；適用於中國市場。