Earlier this year, Telsa Motors made headlines when it announced that the company would start selling Tesla-branded stationary storage batteries. The move was expected, but a bit odd—battery storage for homes has been around for years, but it has never really been cost-effective enough in most households to merit the kind of treatment that Tesla gave it. While Tesla successfully nurtured a luxury electric vehicle market, it still seemed out of place to see a luxury brand going out of its way to put car batteries on homes.
Ars argued that the real news behind Tesla's stationary storage announcement was not that of the consumer-focused Powerwall, but that of the power pack, Tesla's stationary battery system for industrial use cases.
The truly surprising part of Tesla's Powerwall announcement, however, was its price point. In 2014, the average cost of installing a stationary Li-ion battery in a California home was $23,429, according to the Wall Street Journal. In May, Tesla CEO Elon Musk said that this batteries would start at $3,500, plus a $500 installation cost.
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