Independent Weekly: ENERGYAUSTRALIA has warned of a $600 million blow-out in power bills next year, claiming the federal government has underestimated the number of certificates it will issue as an incentive for installing small-scale solar energy systems on homes and businesses. The NSW government-owned power company warns in a submission to the federal government that the estimate upon which the renewable energy certificate scheme was based ”is likely to prove far too modest”. ”The financial impact of this…