We can put many things next to each other and get the job done ... it isn't an integrated all-in-one package, but it is a solution. We can't compare such a solution to an AIO (with embedded gen), other than they both achieve the same result. I already have this "pile" of individual components ...
Current manufacturers of solar gen's have really proprietary features ... no surprise there. But, it's something I'd never buy, for obvious reasons of small capacity, high cost, etc. Works for many others to make that trade-off, but I can't make that choice. I've already built my own versions of a solar gen ... I keep the parts on hand as fallbacks to other solutions, and for small projects around the property. All off-the-shelf components, somewhat integrated.
If someone offers a Ryobi- or DeWalt-like solution (open framework, plug-in components that each provide one answer to the whole solution), but with none of the "lock-in" factor of these, I'd be more interested in that. This would fit my "small projects" category, such as tiny homes, camping solutions (truck/truck-bed shell), and possibly more. All less than 24v (could even be 12v), and a few common/standardized (off-the-shelf) 12v100ah batteries fits my needs. A common/standardized fuel (propane) gen with low-THD (somewhat off-the-shelf), but that plugs into the framework, would fit my needs as well. I don't want to maintain gasoline & fuel additives, and slop that all over the top of this thing ... propane is plug-and-play.
Your company (Rita) might be the first to offer it, and I might be the first to buy it.