The Electricity Act Article 18

The Electricity Transmission and Distribution Enterprise shall not refuse any request put forward by any Electricity-Generating Enterprise or operator of Self-Use Power-Generation Equipment for connection to its power grid. Renewable Energy-Based Electricity Generating Enterprise shall be given priority in grid connections. However, this Article does not apply to Electricity Facilities or Self-Use Power-Generation Equipment that request connection but do not meet the requirements provided in paragraphs 1 and 3 of Article 25, Article 26, Article 29 to Article 31, Article 71 mutatis mutandis applying the above provisions, or Article 32.
中文原文 電業法第18條
輸配電業對於發電業或自用發電設備設置者要求與其電力網互聯時,不得拒絕;再生能源發電業應優先併網。
但要求互聯之電業設備或自用發電設備不符合第二十五條第一項、第三項、第二十六條、第二十九條至第三十一條、第七十一條準用上開規定或第三十二條規定者,不在此限。

English translation for reference only; the Chinese text prevails. Not legal advice.