I believe the article author confuses the pricing.
As presented I&#x27;m guessing the price quoted by GMP includes the inverter, while the price given by Tesla does not.<p>side note: original article appeared on arstechnica.com
<a href="http:&#x2F;&#x2F;arstechnica.com&#x2F;business&#x2F;2015&#x2F;12&#x2F;vermont-utility-says-it-will-be-the-first-to-install-tesla-powerwalls-in-the-us&#x2F;" rel="nofollow">http:&#x2F;&#x2F;arstechnica.com&#x2F;business&#x2F;2015&#x2F;12&#x2F;vermont-utility-says...</a>