Hi Vajra-
The reason that we have a pervasive charge, or any other attribute, is that we have pulled space apart into different kinds of puckers and twists. This is not a stable static system, but it retains itself as a dynamic resonance. Like the standing waves of a sound echoing in a hall, or the radiations bouncing about inside a black body, combining as they echo and bounce together.
Alan is corerect that this is another of those inexplicable things - but it isn't inexplicable. It's just extremely subtle. And I agree that "something about it is extremely slippery".
An electron, for example, can readily be represented by two resonances, inward and outward directed spatial resonances with 510 KeV charge.
http://members.tripod.com/mwolff/point.html Milo Wolff has done a nice job of presenting the electron's resonance. However, my impression is that you're more interested in where it comes from and goes to, as opposed of what it does while we're playing with it.
The slippery part is that none of this is real, at least not in the sense of Buddhist "aggregates". It's only an "arrangement". Like Wolff's electron, there's not really anything there except circulating probabilities of locating the quality of charge at some point in its orbit, while it is the orbit's action by which the space in which it revolves is defined.
Phrased differently, the tail creates a dog to wag it, while the dog defines its tail into existence to be wagged. One level down and there's nobody home. Just a bark awaiting a place to occur. And that puts us back at the old conundrum, which came first, the fireplug of the dog?

To ask about the material nature of the origins of reality turns out to be most often the wrong question, and it returns a nonsensical answer. It's "not even wrong", as they say.
The way to fit this to Buddhist thought is through the Prajnaparamita Sutra - which is why they call it the "diamond cutter sutra". Start with emptiness.
So we can build an hypothetical reality from emptiness, probability, and logical consistency. On a nice clean sheet of emptiness, using only an imaginary compass and protractor, draw two shapes. Obviously, this is going to be difficult, so instead, you can find any two potential shapes that might have existed if someone had been there two draw them. These shapes occur in
potential state space, and they are not "real and enduring forever" as would be matter. Potential states are any states that might be defined or might occur under some set of conditions, including the shapes formed in your forebrain by your imagination, and they have no more reality than that.
So we now have set apart two "potential instances" of emptiness. The clearly have a logical relationship, both with one another, and also with others of their kind. It is the expansion of this ability to relate to others of their kind that gives rise to universal structure.
Let's add some more of these potential shapes. They occur contingently to the existence of the first potentialities you defined, since we're holding onto those. However, now we are buiding up a network of the ways in which these non-things relate. Further, once we start looking at the potentialities for such shapes, we see that some are more probable, and some of the relationships they manifest are more probable than others. That gives us an expanding set of potentialities, with subsets internally related, and from which we find patterns of possible relationships emerging.
This has taken us from utter voidness to possibilities for contingent manifestation in a probability space, hence phase space. That creates a universe. There are obviously an infinite number of such universes. Each is internally defined as a stable dynamic system that expands by iterated complexions. (Complexion is Henri Poincare's term for what others calla "power set".)
Given an infinite number of potential universes, let me direct your attention to one of them in which all the potential interactions have taken up the shapes and patterns that would be found in a crowd of sentient beings picking cosmic lint out of their non-existent navels. With respect to the viewpoint of one of those sentiencies, the entire universal shmear looks like a regular extended reality, made of rocks and roots, bricks and bathtubs. These guys can't tell the difference.
We live in that kind of place. It has no reality. It has no matter. It is defined only by dynamic relations. By reducing reality to a dynamic relativism we enable ourselves to occupy any potential universe that we can logically reach. Of course, because these universes are in potential state space they are eternal, just as eternal as emptiness.
For example, my non-real-but-seems-real world a week ago included a small pilonidal cyst on my forehead. I adopted Rei's approach of silent prayer and it now has vanished. The mechanism seems to be that we can have any imaginary universe just as easily as the one we're in. All we need to do is to go there. Prayer (aka meditation with God) simply makes one option more probable that the other, and change occurs. That's why I'm so fascinated by CS - they do this routinely.
This is exactly identical to a dream, except that God is the Dreamer, and we are the characters of the dream. It all resolves to the internal mumblings of Buddha-Mind, if you prefer. However, because of the tail-vs-dog problem we are also the dreamers as well as the dream, the actors in space, and the means by which space is defined so that we can be actors there.
It's not that you've got it wrong. To the contrary, Buddhism is an excellent expression of the truth of this. What's happening is that there are literally millions of equivalent expressions that are all partly correct and partly verbal analogies, and we get tangled up in the details rather than understanding the collectivity.
Following the tail-vs-dog, God is innate, immanent, occurring by its own nature within emptiness. That does not mean that God is a person, nor a buddha etc. God turns out to look a lot more like the thermodynamics of a non-populated Riemannian void that has the capacity to have potential states. But that means that the sentiency of God is located in us, and not in the original emptiness. However, the roots of that sentiency must be in the innate nature of God, which can be described as a collection of contingencies in emptiness. So now we have our minds projecting God, and God projecting our minds, and both projecting a place in which we live. But in the end it's still empty.
Better this time?
dave