Confused about plug-in solar
I'm just start to look into plug-in solar, and I'm confused about how it works. From what I saw on a couple of videos, it either plugs right into a 120v plug, or plugs into a bigger 240v outlet much like you'd use to power the entire house from a whole-house generator.
What I'm confused about is --
am I just confused and this is totally wrong, and
if I'm not confused, how is this not dangerous. When you power your house with a generator you need to use a lockout switch switch so you never simultaneously receive power both from the grid and also your generator. Why is this not required for plug-ion solar?
[edit]
It looks my primary point of confusion was generally that pushing energy into a wall outlet is generally actually safe, and the biggest risk is actually to line workers if there is a widespread outage. Previously if you'd asked me, I would have claimed that generators have lockout switches because you would potentially blow the generator or start a house fire or something. But it sounds like in principle you can just put energy back into your system, and the primary problem is just ensuring this is done in a safe and regulated way.