Power supplier Scottish & Southern Energy said it is on course to achieve moderate profit growth for the year despite distributing less electricity in the three months to June 30.The firm distributed 9.4TWh (terawatt-hours) of electricity in the quarter, compared with 9.9TWh over the same period the previous year.However, the firm gained 50,000 more electricity and gas customers during the period, bringing the total number to 9.1m. Renewable energy output (from hydro-electric schemes, wind farms and a biomass plant) rose to 1,116 GWh (giga-watt hours) from 967 GWh."The first three months of our financial year have seen steady progress across our key operations and major investment projects, and given us a good start on the road to achieving moderate growth in adjusted profit before tax in 2009/10," said chief executive Ian Marchant.