question

@Tengis Doer yes, you can technically have as many charge sources as you like connected to the same battery, but make sure the way you've drawn it isn't the way you actually wire it - you'll want each charge source POS independently fused and connected to a POS busbar in this case. You don't want to just join two POS lines together in the middle of a run, both because each line needs to be independently fused as well as because each line should be of a gauge appropriate to the current it's carrying and the distance it's running.

But, as a simple question regarding multiple charge sources charging the same battery, yes, there's nothing wrong with that.

Of course, be advised that one or the other of the devices will likely charge at a decreased rate because the other device charging has already raised the battery voltage. But that's something of a side issue.