In general, we can consider that 7.7 acres of floating photovoltaic plant can produce 10MWp (eq. 1 hectare for 1,3 MWp) on the water body. Besides, we have to consider a safety distance between the floating solar panels and the banks, which means that the maximum coverage rate of the water body is 65% on average.
1 acre = 0,4047 hectare