Rooftop Solar + Tesla Powerwall 2 Already Cost-Competitive With Grid In Australia! Last month, Tesla launched its Powerwall 2.0 residential battery storage system, a little less than a year after Powerwall 1.0. Compared to Powerwall 1.0, peak power has increased by 40%, continuous power by 50%, storage capacity by 100% (to 14 kWh), and an inverter is included. And all this for US$5,500 ($A8,800) – about the same price as Powerwall 1.0. In other words, the price per kWh stored and re-used has halved in less than a year. Indicative installed prices in Australia are a little over $10,000. The commonly accepted wisdom was that battery costs would decline more gradually than the precipitate decline seen in solar PV costs. This has been proved wrong. A typical household in the suburbs of Adelaide can now meet its electrical needs with solar and battery storage for about the same amount they would pay on a competitive offer from the grid. And of course we can only expect the consumer cost of grid electricity to keep rising.... it has not yet seen any year on year reductions. See http://ift.tt/2eVdhbI
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