Soaring installations of batteries has helped halve the need for expensive new poles and wire projects out to 2050, according to the grid operator.

AEMO says the outlook for Western Australia's main electricity grid has improved since last year, thanks in part to the impact home batteries are having on peak and minimum demand.

Energy use is being revolutionised on the home front as families adopt solar panels, but massive data centres will contribute to overall grid demand doubling over 25 years.