Don't worry, it's just another self-delusion /scam along the lines of "This car runs on water", "Free electric from the vacuum", "Fool electric into doing your bidding with this one weirdly wound torroid".

My advice? Don't be the first to buy one, no matter how much you believe. And if you do buy, get it via their Amazon store.

Further to this, the PowerWall unit will be capable of fast charging your Tesla car. A 13A socket takes all night, while the high power output of the battery bank can do it in half an hour. Ideal if you nip home for a recharge.

It depends entirely on the application though. If you can cycle the batteries, you can do things like charge the battery off the grid at night in the winter, when it is cheaper, then discharge during the day when rates are higher. You'd never do that with SLA!

Also, scrap value lead acid batteries are very cheap. There is not yet a comparable market in older lithium cells.

NiMH aren't nearly as good as lithium. They are far better than Lead-Acid or Nickel-Cadmium, though.

It's no conspiracy, lithium is just far lighter and holds more electricity.

And yet, despite EMF everywhere - every phone, every computer, GSM networks and wi-fi in nearly every house - people have never been healthier!