Immediately after Tesla released Tesla Powerwall, the Internet was flooded with lots of articles discussing the real pricing of the new Tesla product. You do not have to be a genius to notice that Powerwall is not economically efficient. Even the economics behind lead acid batteries based systems is debatable, although these batteries cost three times less than the Li-Ion batteries used by Tesla. Sure, lead acid batteries are bulkier, however this does not matter much in a house. They might not resist to so many discharge cycles like Li-Ion, but that’s just theoretical. At the same time, lead acid batteries have some advantages too. For example, they can easily sustain a high discharge current, which makes them appropriate for fast charging jobs (like charging your car really fast).