As a solar energy hound, I am worried about backdoor upgrades to inverters that are like sleeper cells. Wait for the time when the grid goes down or internet goes out and the inverter become a brick. aka run code to permanently disable as in the time of war and/or invasion.
Yup. Modern inverters are smart which means that they can be hacked. All of the software bells and whistles make a device vulnerable.
Also, few people realize that your roof top solar panels will not work independently of the power grid. The power grid that the solar panel systems connect into goes down and your expensive solar panels stop working too. There should be a provision that allows you to run your home directly from the solar panels. Probably too much load but at least you can charge your cell phones, power a radio, etc.