An update on this topic for those interested. My MCU version is now 6211, I mention this because this version has a new check box on the Battery->Charge screen labeled "Force Gen" and it has different BasicSetup->Advanced screen layout with "Gen Limit Power" setting with no check box. These screens change from version to version, often do not match the manuals available and also do not match what one can see and set in pv.inteles.com so take care. I think the ones on the inverters display should be considered the correct ones.
The first thing I have learned is that there is a delay before the inverter will qualify the generator and close the connection to it. That delay on my inverter is 40 seconds and I have not found anything that can change it. So once your generator is on and your gen breaker is closed, it will be 40 seconds before your inverter will draw power from your generator. My Sol-Ark tech support engineer was not aware of this delay and did not know how to change it. I also could not find any setting that would change it. So be patient when testing or you will get confused like I did.
The second thing I will mention is that when I checked the "Force Gen" check box and have a current higher than about 20A in the gen charge settings on the same screen and wait the 40 seconds the generator will be connected and start charging. I do not have to have any of the charge boxes in the TOU screen checked and I do not think any other settings are needed to get the generator to charge. I think this "Force Gen" check box causes the control to ignore the "StartV" and just start charging.
The third thing I have learned is that the "StartV" on both the grid and gen charge cannot be higher than 2V below the battery float voltage you have set on this same screen. It took awhile to figure this one out through trial and error. Have no idea where 2V comes from.
In my case it seems generator wave forms have nothing to do with this issue. And for the record when my generator is under load the waveform gets flat topped and looks worse than the one I posted above.
Maybe the above might help someone one day.