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I heard it was coming. Its the next new fantastic thing to save our problems ! But why ? I couldn't find out. Last night, it was all over the news, and us Aussies are going to be able to trial it ! Lucky us (its because we have so many solar panels ) and and ... blah blah . Why do I get the feeling when watching this ; it hype, flattery, a good deal, amazing new technology, .... but no real; specs or science or explanation why its so good. Then I watched the release video . Why does it seem like a cult gathering. Why all the emotive giant screen nasty 'this is how we generate pollution' hype , who cares about the specs and why it is better than the current panel battery set ups ... actually ... did they say or explain how it was ? But its a 'Tesla' ! That must mean something ? And it looks soooo coool and compact , if you had that on your wall , people would admire it ! Besides, they make great cars ! Even I thought I was being overly critical , so I checked some Tesla info and 'Powerwall' sites . They were making a big deal about how, the battery stores power from a panel in the day .... and you can use that at night when there is no sun . W T F ! ? It also stores power from the grid , in case the grid has a blackout . But still no reason why its better , overall, and that the specs and relative economics of it were ??? Until I found this ; http://www.bloomberg.com/news/articles/2015-05-06/tesla-s-new-battery-doesn-t-work-that-well-with-solar Eg. " SolarCity is only offering the bigger Powerwall to customers buying new rooftop solar systems. Customers can prepay $5,000, everything included, to add a nine-year battery lease to their system or buy the Tesla battery outright outright for $7,140. The 10 kilowatt-hour backup battery is priced competitively, as far as batteries go, selling at half the price of some competing products. " But if its sole purpose is to provide backup power to a home, the juice it offers is but a sip. The model puts out just 2 kilowatts of continuous power, which could be pretty much maxed out by a single vacuum cleaner, hair drier, microwave oven or a clothes iron. The battery isn’t powerful enough to operate a pair of space heaters; an entire home facing a winter power outage would need much more. In sunnier climes, meanwhile, it provides just enough energy to run one or two small window A/C units. " But SolarCity doesn’t offer a discount for multiple batteries. To provide the same 16 kilowatts of continuous power as this $3,700 Generac generator from Home Depot, a homeowner would need eight stacked Tesla batteries at a cost of $45,000 for a nine-year lease. "It's a luxury good—really cool to have—but I don't see an economic argument," said Brian Warshay, an energy-smart-technologies analyst with Bloomberg New Energy Finance. " ..... Tesla is probably making very little profit on the home batteries at this point and might even be selling them at a loss, according to research by BNEF. Both Tesla and SolarCity are just getting started, trying to get some traction before Tesla's massive $5 billion battery factory begins production next year. That's when the battery market really gets interesting. " Also, they are doing the deal with 'Origin Energy' - people ... do not deal with them ! ( I am speaking from personal and observed experience here. ). I will wait a while and keep using my own system I put together thanks guys But thanks for thinking of Australia first !