The innovation this group has provided is their modular electronic charge controllers and inverters. It's not rocket science. Initial circuit diagrams for prototyping and modification can be found in the public domain. It's just that there's not enough money in this market for for-profits, or at least, that's what the for-profits think. They may be mistaken.
We have a student group working on a similar charging circuit prototype this spring.
Again, this is what I call the "real work", borrowing a line from Gary Snyder. Simple ideas making a big difference, sustainably.