I like the text for the product version. There will be at least 3 variables. Major version of the product, the power modules, and the accessory boards. They don't all have to be reflected in the name, but looking ahead a couple of product cycles, being able to clearly identify all 3 variables would be useful.
Looking at the proposed current line, maybe something like:
Buckeye Integrated One 700H/500H/250H/450P/950P. This would provide overall product and power module along with a clear plan for future models (overall version and other power levels or module manufacturers). The accessory board would be separate.