As far as I'm aware, Energons are not from Eberron but from Planar Handbook and Manual of the Planes. Also they come in 7 different flavors (positive, negative, acid, fire, sonic, electricity, cold). I assume those are the ones you wanted since they're indeed incorporeal and can be summoned by Summon Monster V and can shoot blasts. They have slightly different statistics between them so you want a specific type or just all of them?
Also they can't grapple, that with having a null Str score and null grapple bonus.