Tesla’s price shock: Solar + battery as cheap as grid power

Compared to Powerwall 1.0, peak power has increased by 40 per cent, continuous power by 50 per cent, storage capacity by 100 per cent (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.

Let’s do a solar PV+battery+grid versus grid-only price comparison.

First, let’s assume a 4,800kWh per year household in Adelaide and that its electricity bill is either the average of all 77 market offers after all conditional discounts, or the average of all 77 Market Offers before all conditional discounts, from the 16 retailers operating in Adelaide (data from MarkIntell). Read more…

Tesla’s price shock: Solar + battery as cheap as grid power