OX2 - Summerville BESS.
Executive Summary.
A wide-area impact assessment and connection studies were conducted for OX2’s Summerville Solar Farm and Battery Energy Storage System (SUMSF). The assessment evaluated the project’s compliance with the grid connection requirements of version 211 of the National Electricity Rules (NER) for connection to the Transgrid network.
The project combines a 90 MW solar farm with a BESS of up to 90 MW and up to four hours of storage, across a 182-hectare development footprint on private land approximately 3 km east of Rappville, New South Wales. It will connect to the NSW network via a short underground connection to the existing 132 kV Lismore to Koolkhan overhead line south-east of the site, with the BESS sharing the solar farm’s grid connection infrastructure. The battery allows energy to be stored and dispatched outside daylight hours or during periods of peak demand, with the potential to strengthen grid stability and energy security.