This project took place at a residential property in Shailer Park, in Logan, south of Brisbane, an area within Rethink Green Energy's regular Queensland service footprint. Unlike a system expansion, this was a first-time solar installation for the property, paired with the home's first battery, installed and commissioned in the same job.
The system was tested on 23 April 2026 and the Certificate of Testing and Compliance was signed the following day, 24 April 2026. The compliance paperwork, STC assignment form and retailer statement together confirm the equipment installed, its capacity, and that the installation met the required Queensland electrical safety standard. As with any project of this kind, this case study only reports what the supplied documents actually verify, and flags anything that could not be confirmed.
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The property did not have any solar or battery system in place before this job. The STC assignment form records both the solar and battery components as first-time installations, and confirms there was no other solar PV installation at the address. This meant the project was a complete build from the roof down: panel layout, inverter placement, switchboard work and battery installation all needed to be planned from scratch rather than added to existing equipment.
The roof itself is not a single simple plane. Site photographs show panels installed across three separate roof faces, with compass headings of approximately 37 degrees (north east), 125 degrees (south east) and 299 degrees (north west) recorded at the time of the site visit. A layout spread across three orientations like this is more involved to plan and wire than a single north facing array, and typically points to a roof where no single face offers enough space for the full 30 panel system on its own.
A straightforward single-orientation system was not really an option here given the roof shape, and the homeowner's decision to also install a battery meant the switchboard and cabling needed to be planned for both solar generation and battery charging and discharging from the outset, rather than retrofitted later.
Rethink Green Energy designed and installed a 13.2kW solar system using 30 Huansheng Photovoltaic HSM-ND48-DR440 panels, each rated at 440W and certified to IEC 61215:2021, the international standard covering the design qualification and durability testing of crystalline silicon PV modules. Paired with the panels is a single GoodWe GW9.999K-EHA-G20 hybrid inverter from GoodWe's ESA range, which handles solar generation and battery charging and discharging through one unit.
The battery is a 48kWh usable system built from six GoodWe GW8.3-BAT-D-G20 modules, each rated at 8.32kWh, giving a nominal capacity of 49.92kWh. This is a substantial amount of storage for a residential property, and sits at the larger end of what is typically installed in a home battery system. The retailer's written statement confirms that expected payback period, expected energy savings and expected cost savings information was provided to the homeowner as part of the sale, though the specific figures discussed were not included in the documents supplied for this case study, so they are not repeated here.
Splitting a system across three roof faces rather than one, as photographs from this job show, generally spreads a system's solar generation more evenly across the day rather than concentrating it around a single midday peak. North east facing panels catch more of the morning sun, north west facing panels catch more of the afternoon sun, and the south east facing section adds a third source of generation in between. The specific reasoning behind this property's layout was not detailed in the documents supplied, but the pattern visible in the photographs is consistent with a roof where available space, rather than a single ideal orientation, shaped the design.
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The documented steps for this job cover site assessment and system design, equipment selection, installation, electrical testing, and formal compliance certification. Site assessment and system design are part of Rethink Green Energy's standard process for every project, rather than steps specifically itemised for this job in the supplied paperwork.
Installation and testing were carried out on 23 April 2026. Photographs from the job show the new inverter mounted on an external wall with its full technical nameplate visible, along with the battery installed nearby against a brick wall, complete with the required danger signage covering toxic fumes and battery explosion risk. A shutdown procedure label is fixed to the battery enclosure, setting out the isolation steps for the inverter, PV array and battery, along with a contact name for the installing business.
The switchboard was fitted with dedicated isolation points and warning labels for the solar and battery circuits, consistent with the requirements for a combined PV and battery installation. The Certificate of Testing and Compliance was signed on 24 April 2026, one day after installation, confirming the system meets the requirements of the Electrical Safety Regulation 2013 for both the electrical installation and the electrical equipment involved.
The job also generated 494 small-scale technology certificates (STCs) under a 5 year deeming period, assigned to FormBay Trading Pty Ltd as part of the standard rebate process for eligible solar and battery installations in Australia.
A first-time solar and battery installation like this one is a common starting point for Queensland homeowners who want to make one decision rather than two, installing storage from day one instead of adding it later. Rethink Green Energy's own market research notes growing interest in combined solar and battery packages, partly driven by ongoing STC incentives and partly by households wanting more control over their electricity costs from the outset.
This project is a useful demonstration of that scenario in practice. The three-orientation roof layout shows Rethink Green Energy working with the space actually available on a property rather than a simplified textbook roof, and the documentation trail, from the site assessment through to the signed compliance certificate, shows a project that was planned, installed and formally signed off rather than left informally finished. The retailer's written confirmation that payback, savings and cost information was provided to the homeowner is also a genuine trust signal, since it reflects a documented disclosure rather than a verbal assurance alone.
Rethink Green Energy is a family owned and Australian operated solar business servicing homes and businesses across Queensland and New South Wales. Installations are carried out by CEC accredited installers, and every job is backed by a 25 year workmanship warranty. The business also offers $0 upfront options for eligible customers and provides ongoing support after installation, including system monitoring, cleaning and repairs.
This project reflects Rethink Green Energy's stated approach of sizing each system to the property rather than selling a standard package. A 30 panel, three-orientation layout paired with a 48kWh battery is a considered response to this particular roof, not a one-size-fits-all install, and the completed compliance paperwork shows that response was carried through to a properly tested and certified result.
If you are weighing up a first-time solar and battery installation and want to understand what a system suited to your own roof might look like, Rethink Green Energy offers a free, no obligation assessment. Get in touch to arrange a time for a local, CEC accredited installer to take a look at your property.
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