The recent announcement of the 2nd generation Tesla Powerwall sure has shaken up the storage market! Will this be the battery that starts a flood of people into storing their own energy?
I'd given up hope of seeing any quick reductions in the price of storage, after seeing the pricing on most of the currently available batteries, where some of the prices really were eye wateringly high!
As I wrote about the Bosch system a while ago...
>>for the same money you could buy 3 of them, or buy a Tesla car and have a bit more storage capacity, plus you get an awesome car for no extra cost!
Now the situation has changed! Tesla really have stirred things up with the Tesla Powerwall 2, and I'd expect their competitors will have to drastically drop their prices, or be left out of the new storage market.
There will be 2 versions of the battery, the Powerwall 2 DC, with 13.5kWh of capacity, and the Powerwall 2 AC, with 13.2kWh of capacity. Both run at a nominal 50V internally, and a DC to DC converter presents a much higher voltage to the outside world on the DC version, 350-550VDC. The AC version has a range of nominal output AC voltages, to match a variety of configurations.
A maximum continuous power delivery of 5kW, and a 10 second 7kW peak, puts it squarely into the useful range IMO- you can run the electric jug and the dishwasher at the same time!
I've only seen preliminary pricing, but I think this may give some DIY systems, such as I run myself, a good run for their money when you consider benefits such as the 10 year warranty, which certainly gives peace of mind. I've had a CALB cell fail after only a few years, and there was no warranty coverage, despite me being able to show its performance had been non-standard since not after it was installed.
The Powerwall 2 wont be available in Australia for a few months yet, but I'm expecting them to sell like hot cakes.
Energy Matters have a page up with more info here: http://www.energymatters.com.au/residen ... l-battery/