Therefore you can forget completely supplying electricity for an oven, kettle or microwave in most cases.
*Due to local regulations: 800W UK, 600W in some parts of Europe - I believe it's 800W in the US but please DYOR.
Having said all that, their existing PowerStream inverter + battery Power Stations work really well and are literally plug & play. I've been running a setup in the UK and it's drastically reduced our electricity consumption from the grid whilst still being a simple plug & play self-install.
I was looking at this product last week. I remember seeing a photo with a current transformer (CT) in it. Maybe they have the user install a CT on the upstream breaker to ensure the total load for the branch circuit isn’t exceeded. Without that they run into an issue where it could overload the branch circuit wiring.
This kind of PV is popular in the city where I live. I feel queasy about there being sources of power that don't pass the main fuse. I'm sure there are ways to make it safe, but I like the simplicity of having one fuse between power supply and power users.