[jauntywundrkind]

> The secret sauce is that the sunbox is usually off-grid and never pushes power back into the grid. The only reason it's connected to the wall at all is that if it runs out of power it can pull energy from the wall.

Ideally we all could push power back to the grid & that ought not be hard, but in point of fact that can be a huge barrier.

It's not capable of generating as much power, but I love what Zoltux and many others are doing: attaching current sensors to the main breaker box, and using that as feedback to make sure the solar is never generating so much power that it pushes to the grid. Pretty mild 800w power on the Zoltux. https://zoltux.com/

The existing DJI Power 2000 added this capability with a recent software update, if you have a compatible energy meter! Can accept up to 1800 watts of solar power. I'm not sure if there's any difference between this kind of setup and a european balcony solar install? https://www.renewableenergymagazine.com/pv_solar/dji-power-2...

Also, this submission showed up two years ago. 236 points, 230 comments. https://news.ycombinator.com/item?id=40025195