The number of people replying to this thinking that this is novel is both amusing and surprising.
This is a DIY power bank. You can buy professionally-made ones from Bluetti, Jackery, EcoFlow, and many other companies. Including with solar panels. They've been around in some form or another for decades. Modern ones use LiFePO4 batteries, which have a solid safety profile compared to older-generation lithium batteries.
Or you can buy components and build your own, hopefully more safely than the article shows.
Go hang out on r/SolarDIY or check out Will Prowse on YouTube.
Everyone speaks with such confidence that it seems like they know what they're talking about. Then they starting talking the same way about something you're more familiar with and the illusion is quickly shattered.
similar to Elon Musk talking about pretty much everything software. I don't know why he doubled down on having played poe2. https://youtu.be/cZslebJEZbE
This is a DIY power bank. You can buy professionally-made ones from Bluetti, Jackery, EcoFlow, and many other companies. Including with solar panels. They've been around in some form or another for decades. Modern ones use LiFePO4 batteries, which have a solid safety profile compared to older-generation lithium batteries.
Or you can buy components and build your own, hopefully more safely than the article shows.
Go hang out on r/SolarDIY or check out Will Prowse on YouTube.