I watched that video. When it came out. I also watched the update on the project. I believe she was able to get it setup right? It was mostly problems with the installation. I believe. It’s been a while. Since I seen them earlier this year.I would call many of the issues fundamental design errors, several more come from spreading the engineering, install, etc across three different companies.
Here's an example of one of the many fundamental design errors:
Agreed with others above that the industry really needs to finish writing and publishing workable universal standards for DC and / or AC coupling to the home energy systems. Vendor lock in is not the way.