In many Adelaide homes, storage can be added without starting the solar system again. The right path depends on the existing inverter, switchboard, meter, battery location, evening use and whether you want blackout protection.
What affects the decision
If the current solar inverter is healthy and suitable for the final design, it may be retained. An AC-coupled battery can be added alongside it, while a hybrid changeover can make more sense when the inverter is due for replacement or the system is being redesigned. PDG Energy checks the existing equipment, electrical arrangement and future loads before recommending either path.
Two common retrofit paths
Both approaches can be practical. The existing solar equipment and the desired outcome determine the recommended path.
| Path | What stays or changes | Often considered when | What needs confirmation |
|---|---|---|---|
| Keep the existing solar inverter | An AC-coupled battery system is added alongside the current solar inverter. | The existing inverter is healthy and the goal is to add storage without redesigning the entire solar system. | Inverter compatibility, monitoring, switchboard space, battery location, export arrangement and the final backup scope. |
| Move to a hybrid inverter | The solar inverter may be replaced as part of a combined solar-and-battery design. | The current inverter is approaching replacement, the system needs wider electrical changes, or an integrated redesign is preferable. | Existing panel strings, system capacity, warranties, approvals, electrical work, monitoring and the final installed scope. |
The decision is not just about battery brand. Compare the final equipment path, installed scope and supported features, then review battery brand options once compatibility has been established.
Panel age alone does not determine whether storage can be added. The review looks at the inverter model and age, recent solar production, monitoring access, visible condition, fault history and any original system documents. A healthy system may support an AC-coupled battery path, while repeated faults, limited support or a planned solar expansion can change the recommended design.
A larger battery is not automatically the better retrofit. The useful starting point is when electricity is used after solar production falls, how much spare solar is available to charge storage, and whether high-demand appliances or an EV will run at the same time. The proposal should distinguish usable battery capacity, power output, backup capability and the loads that the final system is designed to support.
Quote factors
These factors help make quotes comparable. The applicable detail depends on your property and selected system.
Capacity is designed around solar generation, evening use and the outcome you want from storage, not a fixed package label.
Keeping an existing inverter or moving to a hybrid design changes the equipment, electrical work and final quote scope.
Available switchboard space, phase, metering, battery location, cable distance and network requirements all need review.
Backup circuits, air conditioning, pool equipment, heating and EV charging affect the inverter assessment and design.
Design decisions before quote
A battery is part of the home electrical system. Backup expectations, retailer arrangements and future loads should be discussed before equipment is selected.
A battery does not automatically provide whole-home backup. The final system needs the correct battery, inverter or gateway, switchboard design and agreed circuits. Ask what stays on during an outage, whether the house is single or three phase, and what operating limits apply.
Older feed-in tariff arrangements can affect the economics of using or exporting solar. Check the current retailer terms before making a decision. Storage may reduce daytime exports by using more solar at home, but it does not automatically protect or improve an existing tariff.
Prepare for an accurate scope
Photos and usage information allow the existing system to be assessed before a site visit or final proposal. They also reduce the risk of comparing a headline battery price with a different installation scope.
Case study publishing standard
PDG Energy does not publish a retrofit case study until the homeowner has approved the location and project details for release. That avoids presenting an illustrative installation as a completed local project.
Guide FAQ
For a confirmed scope, move from this guide to the relevant core installation service.
Often, yes. A compatible AC-coupled battery can sit alongside a healthy existing solar inverter. The inverter model, age, monitoring, electrical arrangement and final battery design need to be checked before this is confirmed.
Neither path is automatically better. AC-coupled storage can suit a healthy existing solar system, while a hybrid path can suit an inverter replacement or wider redesign. The practical option depends on the property and selected equipment.
Possibly. Space, protection, phase arrangement, meter configuration, cable route and the backup design are assessed as part of the installation scope.
Only the circuits and loads supported by the final equipment and backup design will operate. Whole-home backup is not assumed; the proposed backed-up circuits and operating limits should be written into the quote.
Your retailer tariff and solar export arrangement should be checked before deciding. A battery can change how much solar you export, but it does not automatically preserve, replace or improve a retailer tariff.
Yes, it can be assessed as part of the plan. An EV charger needs its own supply, cable route, protection and load assessment, and it can affect the battery and inverter design.
We will assess the site, confirm the equipment path and document the actual installation scope.
