The promise of lower power bills has pushed millions of home owners to install a home battery in the last 12 months. But not all of them feel better off.

The promise of lower power bills has pushed millions of home owners to install a home battery in the last 12 months. But not all of them feel better off.

The Cheaper Home Batteries scheme is on track to notch up half a million installations in August, according to the latest tally, as the hugely successful federal government rebate…