Actually, Tesla left this world after inventing many technologies that were at the time revolutionary. The Tesla coil enabled the growth of the electronics industry including the radio. So, it's not as if he was some hype man selling false hope and belief. And, he got it wrong when it came to DC-based power delivery systems. so there is that.
That said there is plenty of hype surrounding Tesla the company. That battery wall. It's nice, (I guess) but mostly just vapor ware. As
this article said, their battery specs and costs make it look attractive until the nitty gritty details are factored in. After that, not so much.
Is the Tesla Powerwall worth it?
In our opinion, the Powerwall battery itself is the best home battery for solar storage because it gives you great advanced features and technical specs for the lowest price possible.
But, is the Powerwall worth it? To be honest, not really.
Unfortunately, Tesla’s decision to only sell Powerwalls with new solar panel installations makes it much harder for homeowners to get their hands on one, which is a huge letdown for a few reasons.
First, homeowners who already have solar panels and want to install a battery can no longer get a Powerwall.
Second, when it comes to solar installations, Tesla is notorious for having poor after-sales service. So now, if homeowners want a Tesla Powerwall, they run the risk of dealing with the subpar customer service that Tesla has been known for. And that’s not just when you’re getting the system installed, it’s a problem you’ll have to deal with over the lifetime of the solar panels - a whole 25 years!
But it's not smoke and mirrors. Somebody will end up profiting from Tesla's innovation. Maybe Tesla, maybe the company that buys them after they go bust.