The technical availability calculation is a complex process to collect, clean and process data sources. Only a significant minority (~25% of installed MW capacity) of battery storage units have complete, concurrent maximum export limit (MEL) and available energy (MWh) data of sufficient data quality. We would welcome efforts to improve data quality, particularly for MEL and available energy data . As the number of batteries connected on the system increases, we will review the viability of running this process annually.