As someone working in power grid, this is quite horrible. There are reasons why PV panels are installed properly at the houses, which proper disconnects etc. If there is fire and this is just plugged in, there is no way to disconnect them. If there is maintenance on the electricity, it can be danger to the electricians, because even if you disconnect the mains, there is still power.
Also these panels had very poor cyber security, their IoT platform had a bug that anyone could control them remotely in masses. Bad actor could have caused serious issues in grid level with them.