It's an egg-cellent time for renewable energy, according to Murdoch University researchers.

Eggshells have raw chemicals that can be naturally replenished and used for power. Credit:Jessica Shapiro

The Perth scientists have discovered how baked eggshells crushed into fine powder can work as a cheap alternative to store renewable energy.

Deputy head for research Dr Manickam Minakshi has carried out a series of tests on supermarket bought-caged eggs since November 2017 to figure out if eggshell powder can work as positive and negative electrodes to power batteries.

"Eggshells have a high level of calcium carbonate, which can act as a form of replenishing energy,” he said.