Complex sentence: The power station consisted of 2 x 30 MW generation units for a peak rating of 57 MWe and was commissioned in 1965 for the then South of Scotland Electricity Board (SSEB).
Split into simpler sentences: The power station consisted of two 30 megawatt (MW) generation units for a peak rating of 57 MWe. It was commissioned in 1965 for the then South of Scotland Electricity Board (SSEB).