Energy Storage Filters SUNSYS HES L IEC Scalable outdoor Energy Storage System - from 100 kVA / 189 kWh to 600 kVA / 1827 kWh SUNSYS HES L SKID Drop and start energy storage systems - from 100 kVA / 189 kWh to 600 kVA / 1218 kWh SUNSYS HES XXL IEC High power energy storage system - from 1 MVA / 1 MWh