The solar plexus chakra is associated with what I call the "Ancestral Powers." These Powers are distinct both from the Ancestors themselves and the Ancestral Holies, though there's a greater overlap with the Ancestral Holies. I think the distinction is still important to maintain.
The Ancestral Powers are the god-forms and distinct spirits that were worshiped and revered by our ancestors in cultures without a predominantly Christian worldview. You could think of them as the gods of old and so on.
Understandably, you might find people in our modern Christian culture who have a concern with worshiping deities of other traditions for a variety of reasons; thus, the solution is to pay a kind of homage to them (again, this can be an energetic homage) without completely bowing down to them.
In other words, not everyone is comfortable with the notion that "God is God is God," or that the Divine manifests in multiple forms. To acknowledge the Ancestral Powers is to acknowledge that other people did have different conceptions and experiences of the Divine and the Spiritual, even if those conceptions and experiences are, in the estimation of some modern individual, mistaken.
"Mistaken notion of the Divine" isn't something I'm here to discuss, nor would I be competent to do so for the most part; there are highly skilled theologians, philosophers, and mystics you can turn to for that.
So what of the difference between Ancestral Holies and Ancestral Powers? The line is blurred, to be sure, but I think the Powers are more distinctly relatable and have a higher measure of consciousness, as it were, whereas the Holies may be seen as having less consciousness and less relatable as an entity.
Our next entry will wrap up the series on the Ancestors.