What is the most energy efficient heat pump / AC unit?

I currently have 2x 2 ton Trane XR14 gas furnace / AC units which pulls about 3200 watts each when the AC is running and trying to see if a new heat pump / AC unit would use less energy? Or would it even be worth it? Now my 3x encharge 10 batteries barely keep up if I am running the AC at night.... the 34 x LG 380W panels supply enough power through the day for the most part, but wondering if I should upgrade these to a seer 20+ unit? or spend my $ elsewhere? I was looking at the Rheem RP20 which is a seer 20 unit.... the amperage appears to be about the same though.