Australia’s energy future lies in households sharing access to larger-scale batteries and not defecting from the grid with single home batteries, energy experts say.

The rise of shared electricity – the ability to trade power between households – is supporting community-based mega-batteries, like Tesla’s 100-megawatt battery in South Australia, and putting more power in the hands of consumers.

Energy experts believe Australia will see more mega-batteries, like Tesla's installation, in communities around the country. Credit:David Mariuz

Perry Stoneman, the global head of energy utilities for business intelligence firm Capgemini, said defecting from the grid and installing household batteries would cost more in the long run.

“If you put a battery on the house, the cost of that battery is going to be three to four times of a battery compared to if it was put on the grid,” Mr Stoneman told Fairfax Media.