Seventy-three-year-old Brian Gillespie from South Australia's Eden Valley did not even realise there was a state-wide blackout last week.

"I'm a bit of a news freak so I tend to watch the local news on Channel Seven or Nine, then I watch first quarter of an hour or 20 mins of the world news on SBS and in the meantime I'm recording The Project," he said.

"It was lovely, the power went out everywhere and then we bounced back and in fact it was quite funny because we couldn't work out if the power had actually gone out or not because all of our lights are on one circuit, so we realised when we tried the oven light.

Each house will have a Tesla Powerwall. Tesla

"We sat and watched television, we microwaved a meal, read a book and went to bed."

In some fortuitous timing, Mr Gillespie had a new Tesla Powerwall battery installed a few weeks ago to complement his solar panels. He said a year of "at least monthly" blackouts in his area was a "kick in the bum" and he decided it was time to take charge.