https://blog.wongcw.com/2020/04/17/%e7%89%b9%e6%96%af%e6%8b%89%e7%99%bc%e5%b8%83powerwall%e6%96%b0%e5%8a%9f%e8%83%bd%ef%bc%9a%e5%81%9c%e9%9b%bb%e6%9c%9f%e9%96%93%e5%8f%af%e7%94%a8%e5%ae%b6%e7%94%a8%e9%9b%bb%e6%b1%a0%e7%b5%84%e7%82%ba/
特斯拉發布Powerwall新功能:停電期間可用家用電池組為汽車充電