Reliance Energy has posted a 13% increase in net profit at Rs 176.61 crore for the quarter ended June 30, 2006 (Q1FY07) when compared with Rs 156.63 crore for Q1FY06.According to an official release issued today, total income has increased to Rs 1325.97 crore for Q1FY07 from Rs 1084.44 crore in Q1FY06.