A homeowner in Trinity Park, on the northern beaches of Cairns, reached out to Rethink Green Energy after years of relying on an ageing solar system that was no longer keeping up with the household's power needs. With panels showing wear and an outdated inverter running the show, the family wanted a proper upgrade rather than another temporary fix, along with a battery that could genuinely back up the home during outages and high-use evenings.
This case study walks through the full replacement project, from the initial assessment through to the finished system. It covers the exact panels, inverter and battery hardware installed, the two-stage installation process, and the compliance testing completed at every step, giving a clear, real-world look at what a full solar and battery upgrade involves for a Queensland home.
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The homeowner in Trinity Park had solar for several years, but the original system was starting to show its age. The panels carried visible staining and grime after years on the roof, and the old inverter was no longer keeping pace with the household's needs. Power bills were creeping up again, and the family wanted more than another patch job. They wanted stored power they could actually rely on during outages and evening peak periods, without paying for a system that was oversized or bolted together as an afterthought. Like many homeowners across Queensland, they were not sure whether a battery would genuinely pay off, or whether it made sense to replace a system that was still technically working.
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After assessing the existing setup on site, our team recommended a full replacement rather than a partial fix. The old inverter and panels were removed and replaced with 36 Aiko 525W panels and a GoodWe 9.999kW hybrid inverter, giving the home 18.9kW of new generation capacity. Six GoodWe battery modules were fitted indoors, delivering 48kWh of usable storage from a 49.92kWh nominal capacity, enough to see the household through most evenings and short outages without drawing from the grid. Sizing the battery to the home's actual daily use meant the homeowner got real backup, not a system built around a sales target.
The project was delivered in two stages to work around the household's schedule. Our licensed installer fitted and commissioned the battery system first, completing electrical safety testing and compliance certification before it went live. The team then returned to remove the ageing panels and inverter and install the new Aiko and GoodWe system, again finishing with full testing and sign-off under Queensland's electrical safety requirements. Every stage was documented, from the underground cable and site diagrams through to serial numbers for each panel, battery module and inverter, so the homeowner has a complete paper trail for warranty claims and future servicing.
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This project shows what a proper system refresh looks like when the goal is reliability rather than just a lower bill. Instead of leaving an underperforming system in place and adding a battery on top, the homeowner now has matched components built to work together and sized around how the home actually uses power. It is the kind of upgrade many Queensland households are weighing right now, particularly as older systems reach the end of their working life and battery rebates make storage more affordable than it used to be.
Every job carries a 25-year workmanship warranty and is completed by CEC accredited installers who handle the compliance paperwork correctly the first time. As a family owned, Queensland based business, we design systems around what a home or business actually needs, not what looks good on a sales sheet. From the first assessment through to testing and sign-off, our team stays on hand for the aftercare that keeps a system performing the way it should for years to come.
If your solar system is ageing, underperforming, or missing the battery backup your household needs, book a free, no obligation assessment with Rethink Green Energy. Our accredited team will look at your existing setup and show you exactly what an upgrade could look like, with straightforward advice and no pushy sales pitch. Call 1300 115 209 or request your assessment online at rethinkgreenenergy.com.au.
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