The image in your post represents the veneration of Osiris in his most sacred form as the Djed pillar and below, in his mummified form. A little understanding about the position of the arms of the seated goddesses, Isis and Nephthys, conveys this meaning. It is replicated everywhere and attests to adoration or veneration. The four great pillars are combined in the Djed pillar, where the four 'discs' around one axis are symbolic of the Oneness of creation.
It is typical in hieroglyphic depiction to represent 'many' or 'plurals' by repeating a design. Could this be what the four 'discs' are on the Djed pillar?
In your image - and also the one I have added below - Osiris wears the double feather crown and holds the Nekhakha flail and Heqa sceptre, symbols of kingship. To my mind, he simply returns the adoration with his protection of the Ka and Ba, offering immortality to the deceased, here represented as himself - completing the cycle. Some perceive the image to be a representation of the abstract: being 'blessed' with an eternal life that can only be bestowed by the god Osiris.
See this image:
The cartouches honour Osiris: the one on the right describes him as "asir nb ddw" which reads: "Osiris, Lord of Djedu (a town)" whereas the cartouche on the left describes him as "Great god of Abydos". He is flanked by the goddess Ma'at (sometimes confused with Isis but the feather distinguishes her here). These are titles which can be recognised on stela, coffins and sarcophagi in museums all over the world as part of a typical formula which beseeches Osiris to bestow his grace and immortality on the deceased.
The Ancient Egyptians associated death and the dead with the West, as that is the horizon on which the sun set in its daily round. In this respect, your interpretation of "drawing down energy from the Sun" is interesting as it attests to the AEs belief in the "Westerners" living in a world where the Sun has set: its energy, its life-giving properties essential for the resurrection of their dead.
For me, this is simply an expression of religious belief. It does not make the Ancient Egyptians simpletons or "country bumpkins", but a people for whom life after death was an important part of their belief system. To suggest otherwise is comparable to telling our own world's Christians and Muslims that they are all "country bumpkins" too, for having the audacity to believe in the resurrection of something we call the 'soul'. There is no difference.
Post Edited (28-May-14 12:15)