Nova Scotia Power (NSP) is testing Tesla batteries in a pilot project exploring how they can be used to provide a more reliable power supply.

Tesla Inc switched on the world's biggest lithium ion battery on Friday in time to feed Australia's shaky power grid for the first day of summer, meeting a promise by Elon Musk to build it in 100 days or give it free.

A software change gives drivers of Model S and X cars temporary access to increased battery life.