Elon Musk: @SawyerMerritt @Tesla 目前，供应太少，但应该可以在年底单独订购 Powerwall

原推：@SawyerMerritt @Tesla For now, supply is too low, but ordering a Powerwall by itself should be possible end of year
https://twitter.com/elonmusk/status/1566950472015028225