Many existing solar systems can be upgraded with battery storage, but compatibility needs to be checked before choosing a battery. The right approach depends on your current inverter, solar array, switchboard, meter, communications and the battery manufacturer's approved configurations.
Check the existing inverter
Some systems may support a DC-coupled battery, while others may be better suited to an AC-coupled design with a separate battery inverter. Not every inverter can work with every battery, so the exact model and firmware or configuration requirements matter.
Review the switchboard and meter
The switchboard may need changes to accommodate new protection, metering or backup circuits. The battery location also needs to meet applicable safety, access, clearance and installation requirements.
Decide whether backup is required
Adding a battery does not automatically provide blackout protection. Backup functionality requires compatible equipment and the circuits to be designed and connected accordingly. Ask which loads will remain powered and what the battery can supply.
Check incentive eligibility separately
Some existing-solar battery installations may qualify for the Cheaper Home Batteries Program if all current product, capacity, installer and installation requirements are met. Eligibility should be checked against official guidance and the exact proposed equipment.
Prepare for an assessment
Provide your existing solar proposal or inverter details, recent electricity bills and photos of the switchboard and meter if available. Our battery installation Brisbane page explains the assessment process.