Cardinia Childcare: 100kW PV, 180kWh/90kW battery

Enhar’s Scope:

• Detail design for construction – SLDs, Schematics, switchboard GAs;
• Board builder liaison and management;
• Site testing including, relay setting, injection testing and power quality logging;
• Grid Applications – United Energy and Ausnet.

Project Details:

• 2 x 100kW roof top solar PV systems, 2 x 180kWh/90kW Redflow batteries
• Victron inverter/chargers and control
• Changeover switch to bypass batteries
• Volt Amp / Volt Watt response modes
• Export limited.
• Grid protection relay on solar inverters and inverter chargers.
• Minimal volt drop through the 2250A DC switchboard

Project Challanges

• Flow batteries require significant space with limited room on site; however they have a long lifetime
• Flow batteries are required to be fully discharged every two days 
• Victron inverter/chargers are single phase, therefore a phase imbalance relay was required
• Multiple solar PV orientations

Awards

• Runner up in the 2019 NECA excellence awards under the Energy Efficency and Environment
• https://neca.asn.au/vic/2019