Winemakers struggle with rising power costs

South Australian winemaker David O'Leary thought he was doing the right thing when he bought roof-top solar panels two years ago to try to bring down his winery's escalating power bills. But since O'Leary Walker Wines put the 30-kilowatt unit on top of one of its buildings in the Clare Valley, the winery has found its annual power bill has increased by 50 per cent to $50,000 a year.